diff --git a/.github/workflows/switch.yml b/.github/workflows/switch.yml
index ad9767528..f60251717 100644
--- a/.github/workflows/switch.yml
+++ b/.github/workflows/switch.yml
@@ -89,6 +89,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+
       - name: Configure AWS credentials
         id: aws-login
         uses: aws-actions/configure-aws-credentials@v4
@@ -116,7 +119,7 @@ jobs:
 
       - name: Export Polly Voices
         run: |
-          components/freeswitch/bin/export_aws_polly_voices components/freeswitch/conf/autoload_configs/polly_voices.xml
+          components/freeswitch/bin/export_tts_voices > components/freeswitch/conf/autoload_configs/tts_voices.xml
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
diff --git a/.rubocop.yml b/.rubocop.yml
index ef9dc662c..94c727901 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,6 +2,9 @@ require:
   - rubocop-performance
   - rubocop-rspec
 
+AllCops:
+  NewCops: enable
+
 Style/FrozenStringLiteralComment:
   Enabled: false
 
diff --git a/.tool-versions b/.tool-versions
index ae1afb27d..2f09535ff 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1,2 @@
 terraform 1.5.6
+ruby 3.2.2
diff --git a/components/app/Gemfile b/components/app/Gemfile
index 772cf6237..c7ba36dee 100644
--- a/components/app/Gemfile
+++ b/components/app/Gemfile
@@ -2,6 +2,8 @@ source "https://rubygems.org"
 
 gem "adhearsion", github: "somleng/adhearsion"
 gem "aws-sdk-lambda"
+gem "aws-sdk-polly"
+gem "blather", github: "adhearsion/blather", branch: "develop"
 gem "faraday"
 gem "http"
 gem "okcomputer"
@@ -11,6 +13,8 @@ gem "sentry-ruby"
 gem "sinatra"
 gem "sinatra-contrib", require: false
 gem "skylight"
+gem "sucker_punch"
+gem "tts_voices", github: "somleng/tts_voices"
 
 group :development, :test do
   gem "rubocop"
diff --git a/components/app/Gemfile.lock b/components/app/Gemfile.lock
index 69c47092e..5907f0ff3 100644
--- a/components/app/Gemfile.lock
+++ b/components/app/Gemfile.lock
@@ -1,3 +1,14 @@
+GIT
+  remote: https://github.com/adhearsion/blather.git
+  revision: 03f9cda14ed3f93a80504c2538cd514d6b025d04
+  branch: develop
+  specs:
+    blather (2.0.0)
+      activesupport (>= 2.3.11)
+      eventmachine (~> 1.2, >= 1.2.6)
+      niceogiri (~> 1.0)
+      nokogiri (~> 1.8, >= 1.8.3)
+
 GIT
   remote: https://github.com/samnang/reel-rack.git
   revision: 615a9c9219aa00675a4290c4f7245684c701ea0e
@@ -36,20 +47,32 @@ GIT
       thor
       virtus (~> 1.0)
 
+GIT
+  remote: https://github.com/somleng/tts_voices.git
+  revision: afb3b77d74a0bea12b1c8eaa1303e20076a43912
+  specs:
+    tts_voices (0.1.0)
+      aws-sdk-polly
+
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.8)
+    activesupport (7.1.1)
+      base64
+      bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
+      mutex_m
       tzinfo (~> 2.0)
     addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
     adhearsion-loquacious (1.9.3)
     ast (2.4.2)
     aws-eventstream (1.2.0)
-    aws-partitions (1.835.0)
+    aws-partitions (1.838.0)
     aws-sdk-core (3.185.1)
       aws-eventstream (~> 1, >= 1.0.2)
       aws-partitions (~> 1, >= 1.651.0)
@@ -58,6 +81,9 @@ GEM
     aws-sdk-lambda (1.106.0)
       aws-sdk-core (~> 3, >= 3.184.0)
       aws-sigv4 (~> 1.1)
+    aws-sdk-polly (1.76.0)
+      aws-sdk-core (~> 3, >= 3.184.0)
+      aws-sigv4 (~> 1.1)
     aws-sigv4 (1.6.0)
       aws-eventstream (~> 1, >= 1.0.2)
     axiom-types (0.1.1)
@@ -65,12 +91,7 @@ GEM
       ice_nine (~> 0.11.0)
       thread_safe (~> 0.3, >= 0.3.1)
     base64 (0.1.1)
-    blather (2.0.0)
-      activesupport (>= 2.3.11)
-      eventmachine (~> 1.2, >= 1.2.6)
-      niceogiri (~> 1.0)
-      nokogiri (~> 1.8, >= 1.8.3)
-      sucker_punch (~> 2.0)
+    bigdecimal (3.1.4)
     celluloid (0.16.0)
       timers (~> 4.0.0)
     celluloid-io (0.16.2)
@@ -80,6 +101,7 @@ GEM
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
     concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
     countdownlatch (1.0.0)
     crack (0.4.5)
       rexml
@@ -90,6 +112,8 @@ GEM
     docile (1.4.0)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
+    drb (2.1.1)
+      ruby2_keywords
     equalizer (0.0.11)
     eventmachine (1.2.7)
     faraday (2.7.11)
@@ -134,6 +158,7 @@ GEM
     multi_json (1.15.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
+    mutex_m (0.1.2)
     niceogiri (1.1.2)
       nokogiri (~> 1.5)
     nio4r (2.5.9)
@@ -237,7 +262,7 @@ GEM
     skylight (6.0.1)
       activesupport (>= 5.2.0)
     state_machine (1.2.0)
-    sucker_punch (2.1.2)
+    sucker_punch (3.1.0)
       concurrent-ruby (~> 1.0)
     thor (1.2.2)
     thread_safe (0.3.6)
@@ -274,6 +299,8 @@ PLATFORMS
 DEPENDENCIES
   adhearsion!
   aws-sdk-lambda
+  aws-sdk-polly
+  blather!
   faraday
   http
   okcomputer
@@ -290,6 +317,8 @@ DEPENDENCIES
   sinatra
   sinatra-contrib
   skylight
+  sucker_punch
+  tts_voices!
   twilio-ruby
   vcr
   webmock
diff --git a/components/app/app/call_controllers/call_controller.rb b/components/app/app/call_controllers/call_controller.rb
index f3165921e..de199180b 100644
--- a/components/app/app/call_controllers/call_controller.rb
+++ b/components/app/app/call_controllers/call_controller.rb
@@ -64,6 +64,7 @@ def build_call_properties
       api_version: response.api_version,
       to: response.to,
       from: response.from,
+      default_tts_voice: response.default_tts_voice,
       sip_headers: SIPHeaders.new(call_sid: response.call_sid, account_sid: response.account_sid)
     )
   end
diff --git a/components/app/app/jobs/notify_tts_event_job.rb b/components/app/app/jobs/notify_tts_event_job.rb
new file mode 100644
index 000000000..4ba3ed58c
--- /dev/null
+++ b/components/app/app/jobs/notify_tts_event_job.rb
@@ -0,0 +1,7 @@
+class NotifyTTSEventJob
+  include SuckerPunch::Job
+
+  def perform(client, data)
+    client.notify_tts_event(data)
+  end
+end
diff --git a/components/app/app/models/call_properties.rb b/components/app/app/models/call_properties.rb
index e205c6480..5181e521f 100644
--- a/components/app/app/models/call_properties.rb
+++ b/components/app/app/models/call_properties.rb
@@ -10,6 +10,7 @@
   :to,
   :from,
   :sip_headers,
+  :default_tts_voice,
   keyword_init: true
 ) do
   def inbound?
diff --git a/components/app/app/models/execute_twiml.rb b/components/app/app/models/execute_twiml.rb
index d3556a3e4..886430193 100644
--- a/components/app/app/models/execute_twiml.rb
+++ b/components/app/app/models/execute_twiml.rb
@@ -13,6 +13,11 @@ class ExecuteTwiML
   DEFAULT_TWILIO_VOICE = "man".freeze
   DEFAULT_TWILIO_LANGUAGE = "en".freeze
   FINISH_ON_KEY_PATTERN = /\A(?:\d|\*|\#)\z/.freeze
+  BASIC_TTS_MAPPING = {
+    "man" => "Basic.Kal",
+    "woman" => "Basic.Slt"
+  }.freeze
+
   DIAL_CALL_STATUSES = {
     no_answer: "no-answer",
     answer: "completed",
@@ -105,9 +110,17 @@ def execute_say(verb)
     answer unless answered?
 
     attributes = twiml_attributes(verb)
+    tts_voice = resolve_tts_voice(attributes)
+
+    NotifyTTSEventJob.perform_async(
+      call_platform_client,
+      phone_call: call_properties.call_sid,
+      tts_voice: tts_voice.identifier,
+      num_chars: verb.content.length
+    )
 
     twiml_loop(attributes).each do
-      say(say_options(verb.content, attributes))
+      say(say_options(verb.content, tts_voice))
     end
   end
 
@@ -133,7 +146,12 @@ def execute_gather(verb)
       end
 
       nested_verb_attributes = twiml_attributes(nested_verb)
-      content = nested_verb.name == "Say" ? say_options(nested_verb.content, nested_verb_attributes) : nested_verb.content
+      content = if nested_verb.name == "Say"
+        tts_voice = resolve_tts_voice(nested_verb_attributes)
+        say_options(nested_verb.content, tts_voice)
+      else
+        nested_verb.content
+      end
       result.concat(Array.new(twiml_loop(nested_verb_attributes).count, content))
     end
 
@@ -247,14 +265,9 @@ def execute_record(verb)
     )
   end
 
-  def say_options(content, attributes)
-    voice_params = {
-      name: attributes.fetch("voice", DEFAULT_TWILIO_VOICE),
-      language: attributes.fetch("language", DEFAULT_TWILIO_LANGUAGE)
-    }
-
+  def say_options(content, tts_voice)
     ssml = RubySpeech::SSML.draw do
-      voice(voice_params) do
+      voice(name: tts_voice.identifier, language: tts_voice.language) do
         # mod ssml doesn't support non-ascii characters
         # https://github.com/signalwire/freeswitch/issues/1348
         string(content + ".")
@@ -302,4 +315,28 @@ def sip_headers
   def normalize_recording_url(raw_recording_url)
     URL_PATTERN.match(raw_recording_url)[0]
   end
+
+  def resolve_tts_voice(attributes)
+    voice_attribute = attributes["voice"]
+    language_attribute = attributes["language"]
+
+    default_tts_voice = TTSVoices::Voice.find(call_properties.default_tts_voice)
+    voice_attribute = BASIC_TTS_MAPPING.fetch(voice_attribute) if BASIC_TTS_MAPPING.key?(voice_attribute)
+
+    if voice_attribute.blank?
+      tts_voice = resolve_tts_voice_by_language(default_tts_voice, language_attribute)
+      voice_attribute = tts_voice&.identifier
+    end
+
+    TTSVoices::Voice.find(voice_attribute) || default_tts_voice
+  end
+
+  def resolve_tts_voice_by_language(default_tts_voice, language_attribute)
+    return default_tts_voice if language_attribute.blank?
+    return default_tts_voice if default_tts_voice.language.casecmp(language_attribute).zero?
+
+    TTSVoices::Voice.all.find do |voice|
+      voice.provider == default_tts_voice.provider && voice.language.casecmp(language_attribute).zero?
+    end
+  end
 end
diff --git a/components/app/app/models/outbound_call.rb b/components/app/app/models/outbound_call.rb
index 7c5310096..f378c003e 100644
--- a/components/app/app/models/outbound_call.rb
+++ b/components/app/app/models/outbound_call.rb
@@ -29,6 +29,7 @@ def initiate
           api_version: call_params.fetch("api_version"),
           from: call_params.fetch("from"),
           to: call_params.fetch("to"),
+          default_tts_voice: call_params.fetch("default_tts_voice"),
           sip_headers:
         )
       },
diff --git a/components/app/config/initializers/aws_stubs.rb b/components/app/config/initializers/aws_stubs.rb
index c60b033f3..4770fb77f 100644
--- a/components/app/config/initializers/aws_stubs.rb
+++ b/components/app/config/initializers/aws_stubs.rb
@@ -28,4 +28,16 @@ def to_h
       }
     }
   }
+
+  Aws.config[:polly] ||= {
+    stub_responses: {
+      describe_voices: {
+        voices: [
+          { gender: "Female", id: "Joanna", language_code: "en-US", supported_engines: ["standard"] },
+          { gender: "Female", id: "Lotte", language_code: "nl-NL", supported_engines: ["neural"] },
+          { gender: "Female", id: "Vitoria", language_code: "pt-BR", supported_engines: %w[neural standard] }
+        ]
+      }
+    }
+  }
 end
diff --git a/components/app/lib/call_platform/client.rb b/components/app/lib/call_platform/client.rb
index ecf4ac1f8..9f9ddfec1 100644
--- a/components/app/lib/call_platform/client.rb
+++ b/components/app/lib/call_platform/client.rb
@@ -15,6 +15,7 @@ class InvalidRequestError < StandardError; end
       :api_version,
       :to,
       :from,
+      :default_tts_voice,
       keyword_init: true
     )
 
@@ -32,6 +33,14 @@ def notify_call_event(params)
       end
     end
 
+    def notify_tts_event(params)
+      response = http_client.post("/services/tts_events", params.to_json)
+
+      unless response.success?
+        Sentry.capture_message("Invalid TTS event", extra: { response_body: response.body })
+      end
+    end
+
     def build_routing_parameters(params)
       make_request("/services/routing_parameters", params: params)
     end
@@ -48,7 +57,8 @@ def create_call(params)
         direction: json_response.fetch("direction"),
         to: json_response.fetch("to"),
         from: json_response.fetch("from"),
-        api_version: json_response.fetch("api_version")
+        api_version: json_response.fetch("api_version"),
+        default_tts_voice: json_response.fetch("default_tts_voice")
       )
     end
 
diff --git a/components/app/lib/call_platform/fake_client.rb b/components/app/lib/call_platform/fake_client.rb
index ed5f43084..d29b159d8 100644
--- a/components/app/lib/call_platform/fake_client.rb
+++ b/components/app/lib/call_platform/fake_client.rb
@@ -1,6 +1,7 @@
 module CallPlatform
   class FakeClient < Client
-    def notify_call_event(_params); end
+    def notify_call_event(params); end
+    def notify_tts_event(params); end
 
     def create_call(params)
       validate_gateway_headers(params)
@@ -21,7 +22,8 @@ def create_call(params)
         direction: "inbound",
         to: params.fetch(:to),
         from: params.fetch(:from),
-        api_version: "2010-04-01"
+        api_version: "2010-04-01",
+        default_tts_voice: "Basic.Kal"
       )
     end
 
diff --git a/components/app/spec/call_controllers/gather_spec.rb b/components/app/spec/call_controllers/gather_spec.rb
index e38f35b2a..92b7ba461 100644
--- a/components/app/spec/call_controllers/gather_spec.rb
+++ b/components/app/spec/call_controllers/gather_spec.rb
@@ -442,7 +442,9 @@
       it "handles nested <Say>" do
         controller = build_controller(
           stub_voice_commands: { ask: build_input_result(nil) },
-          call_properties: { voice_url: "https://www.example.com/gather.xml" }
+          call_properties: {
+            voice_url: "https://www.example.com/gather.xml"
+          }
         )
 
         stub_twiml_request(controller, response: <<~TWIML)
@@ -464,15 +466,15 @@
           outputs.first(3).each do |ssml|
             node = ssml.voice.children.first
             expect(node.content).to eq("Hello World.")
-            expect(node.attributes.fetch("name").value).to eq("woman")
-            expect(node.attributes.fetch("lang").value).to eq("de")
+            expect(node.attributes.fetch("name").value).to eq("Basic.Slt")
+            expect(node.attributes.fetch("lang").value).to eq("en-US")
           end
 
           outputs.last(5).each do |ssml|
             node = ssml.voice.children.first
             expect(node.content).to eq("Foobar.")
-            expect(node.attributes.fetch("name").value).to eq("man")
-            expect(node.attributes.fetch("lang").value).to eq("en")
+            expect(node.attributes.fetch("name").value).to eq("Basic.Kal")
+            expect(node.attributes.fetch("lang").value).to eq("en-US")
           end
         end
       end
diff --git a/components/app/spec/call_controllers/run_with_twiml_payload_spec.rb b/components/app/spec/call_controllers/run_with_twiml_payload_spec.rb
index 05480101d..0c1ced503 100644
--- a/components/app/spec/call_controllers/run_with_twiml_payload_spec.rb
+++ b/components/app/spec/call_controllers/run_with_twiml_payload_spec.rb
@@ -3,13 +3,13 @@
 RSpec.describe CallController, type: :call_controller do
   it "executes with the provided twiml payload" do
     controller = build_controller(
-      stub_voice_commands: :say,
+      stub_voice_commands: :play_audio,
       call_properties: {
         voice_url: nil,
         twiml: <<~TWIML
           <?xml version="1.0" encoding="UTF-8" ?>
           <Response>
-            <Say>Hello World</Say>
+            <Play>https://demo.twilio.com/docs/classic.mp3</Play>
           </Response>
         TWIML
       }
@@ -17,6 +17,6 @@
 
     controller.run
 
-    expect(controller).to have_received(:say)
+    expect(controller).to have_received(:play_audio)
   end
 end
diff --git a/components/app/spec/call_controllers/say_spec.rb b/components/app/spec/call_controllers/say_spec.rb
index 97ff01515..833d2a916 100644
--- a/components/app/spec/call_controllers/say_spec.rb
+++ b/components/app/spec/call_controllers/say_spec.rb
@@ -2,6 +2,9 @@
 
 RSpec.describe CallController, type: :call_controller do
   describe "<Say>" do
+    before do
+      stub_request(:post, "http://api.lvh.me:3000/services/tts_events")
+    end
     # https://www.twilio.com/docs/api/twiml/say
 
     # The <Say> verb converts text to speech that is read back to the caller.
@@ -19,7 +22,12 @@
       # |             | Limited to 4KB (4,000 ASCII characters)  |
 
       it "outputs SSML" do
-        controller = build_controller(stub_voice_commands: :say)
+        controller = build_controller(
+          stub_voice_commands: :say,
+          call_properties: {
+            default_tts_voice: "Basic.Slt"
+          }
+        )
         stub_twiml_request(controller, response: <<~TWIML)
             <?xml version="1.0" encoding="UTF-8" ?>
             <!-- Handles whitespace -->
@@ -35,7 +43,18 @@
           expect(ssml).to be_a(RubySpeech::SSML::Speak)
           expect(ssml.text).to eq("Hola, buen día.")
           expect(ssml.to_xml).to include("Hola, buen día.")
+          expect(fetch_ssml_attribute(ssml, :name)).to eq("Basic.Slt")
+          expect(fetch_ssml_attribute(ssml, :lang)).to eq("en-US")
         end
+
+        expect(WebMock).to(have_requested(:post, "http://api.lvh.me:3000/services/tts_events").with { |request|
+          request_payload = JSON.parse(request.body)
+          expect(request_payload).to eq(
+            "phone_call" => controller.call_properties.call_sid,
+            "tts_voice" => "Basic.Slt",
+            "num_chars" => 14
+          )
+        })
       end
     end
 
@@ -58,35 +77,36 @@
         # | Attribute Name | Allowed Values | Default Value |
         # | voice          | man, woman     | man           |
 
-        it "defaults to man" do
+        it "sets a custom voice" do
           controller = build_controller(stub_voice_commands: :say)
           stub_twiml_request(controller, response: <<~TWIML)
             <?xml version="1.0" encoding="UTF-8" ?>
             <Response>
-              <Say>Hello World</Say>
+              <Say voice="woman">Hello World</Say>
             </Response>
           TWIML
 
           controller.run
 
           expect(controller).to have_received(:say) do |ssml|
-            expect(fetch_ssml_attribute(ssml, :name)).to eq("man")
+            expect(fetch_ssml_attribute(ssml, :name)).to eq("Basic.Slt")
           end
         end
 
-        it "sets a custom voice" do
+        it "supports Polly" do
           controller = build_controller(stub_voice_commands: :say)
           stub_twiml_request(controller, response: <<~TWIML)
             <?xml version="1.0" encoding="UTF-8" ?>
             <Response>
-              <Say voice="woman">Hello World</Say>
+              <Say voice="Polly.Lotte-Neural">Hello World</Say>
             </Response>
           TWIML
 
           controller.run
 
           expect(controller).to have_received(:say) do |ssml|
-            expect(fetch_ssml_attribute(ssml, :name)).to eq("woman")
+            expect(fetch_ssml_attribute(ssml, :name)).to eq("Polly.Lotte-Neural")
+            expect(fetch_ssml_attribute(ssml, :lang)).to eq("nl-NL")
           end
         end
       end
@@ -106,7 +126,12 @@
         # so the option is ignored
 
         it "sets the language to en by default" do
-          controller = build_controller(stub_voice_commands: :say)
+          controller = build_controller(
+            stub_voice_commands: :say,
+            call_properties: {
+              default_tts_voice: "Basic.Kal"
+            }
+          )
           stub_twiml_request(controller, response: <<~TWIML)
             <?xml version="1.0" encoding="UTF-8" ?>
             <Response>
@@ -117,12 +142,39 @@
           controller.run
 
           expect(controller).to have_received(:say) do |ssml|
-            expect(fetch_ssml_attribute(ssml, :lang)).to eq("en")
+            expect(fetch_ssml_attribute(ssml, :lang)).to eq("en-US")
           end
         end
 
         it "sets the language when specifying the language attribute" do
-          controller = build_controller(stub_voice_commands: :say)
+          controller = build_controller(
+            stub_voice_commands: :say,
+            call_properties: {
+              default_tts_voice: "Polly.Joanna"
+            }
+          )
+          stub_twiml_request(controller, response: <<~TWIML)
+            <?xml version="1.0" encoding="UTF-8" ?>
+            <Response>
+              <Say language="nl-NL">Hello World</Say>
+            </Response>
+          TWIML
+
+          controller.run
+
+          expect(controller).to have_received(:say) do |ssml|
+            expect(fetch_ssml_attribute(ssml, :name)).to eq("Polly.Lotte-Neural")
+            expect(fetch_ssml_attribute(ssml, :lang)).to eq("nl-NL")
+          end
+        end
+
+        it "uses the default voice if the language is the same" do
+          controller = build_controller(
+            stub_voice_commands: :say,
+            call_properties: {
+              default_tts_voice: "Polly.Vitoria"
+            }
+          )
           stub_twiml_request(controller, response: <<~TWIML)
             <?xml version="1.0" encoding="UTF-8" ?>
             <Response>
@@ -133,7 +185,7 @@
           controller.run
 
           expect(controller).to have_received(:say) do |ssml|
-            expect(fetch_ssml_attribute(ssml, :lang)).to eq("pt-BR")
+            expect(fetch_ssml_attribute(ssml, :name)).to eq("Polly.Vitoria")
           end
         end
       end
diff --git a/components/app/spec/fixtures/vcr_cassettes/inbound_call.yml b/components/app/spec/fixtures/vcr_cassettes/inbound_call.yml
index 858c9e61b..1428e7832 100644
--- a/components/app/spec/fixtures/vcr_cassettes/inbound_call.yml
+++ b/components/app/spec/fixtures/vcr_cassettes/inbound_call.yml
@@ -5,16 +5,16 @@ http_interactions:
     uri: http://api.lvh.me:3000/services/inbound_phone_calls
     body:
       encoding: UTF-8
-      string: '{"to":"1234","from":"1000","external_id":"30393425-1c1d-4c3b-8910-57b54e68133b","source_ip":"192.168.3.1","variables":{"sip_from_host":"192.168.1.1","sip_to_host":"192.168.2.1","sip_network_ip":"192.168.3.1"}}'
+      string: '{"to":"1294","from":"0715100960","external_id":"06c0c60a-47a2-426a-87e9-95ea85d22bf2","source_ip":"27.109.112.141","client_identifier":null,"variables":{"sip_from_host":"192.168.1.1","sip_to_host":"192.168.2.1","sip_network_ip":"10.0.0.1","sip_via_host":null}}'
     headers:
       Accept:
       - application/json
       Content-Type:
       - application/json
+      User-Agent:
+      - Faraday v2.7.11
       Authorization:
       - Basic c2VydmljZXM6cGFzc3dvcmQ=
-      User-Agent:
-      - Faraday v1.4.1
       Accept-Encoding:
       - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
   response:
@@ -25,36 +25,38 @@ http_interactions:
       X-Frame-Options:
       - SAMEORIGIN
       X-Xss-Protection:
-      - 1; mode=block
+      - '0'
       X-Content-Type-Options:
       - nosniff
-      X-Download-Options:
-      - noopen
       X-Permitted-Cross-Domain-Policies:
       - none
       Referrer-Policy:
       - strict-origin-when-cross-origin
       Content-Type:
-      - application/json; charset=utf-8
+      - application/vnd.api+json; charset=utf-8
       Etag:
-      - W/"9e2400d79dcbc837e5921ad5072bf034"
+      - W/"8aa42d1e00281587f058e37db761f7c9"
       Cache-Control:
       - max-age=0, private, must-revalidate
       X-Request-Id:
-      - 750e8f9b-adc3-4836-8786-03631db705d2
+      - daa15cf3-8d31-4958-ad86-2dced50b69d7
       X-Runtime:
-      - '0.043391'
-      Transfer-Encoding:
-      - chunked
+      - '0.052932'
+      Server-Timing:
+      - start_processing.action_controller;dur=0.00, sql.active_record;dur=16.44,
+        instantiation.active_record;dur=0.24, transaction.active_record;dur=26.56,
+        process_action.action_controller;dur=43.11
+      Content-Length:
+      - '498'
     body:
       encoding: UTF-8
-      string: '{"api_version":"2010-04-01","created_at":"2021-06-23T09:02:30Z","updated_at":"2021-06-23T09:02:30Z","voice_url":"https://demo.twilio.com/docs/voice.xml","voice_method":"GET","status_callback_url":null,"status_callback_method":null,"to":"1234","from":"1000","sid":"574f0314-8d52-4a79-a7aa-2ff9898f7b79","account_sid":"0f82ec1a-c776-4669-a0b6-c2b11bef156a","account_auth_token":"pd-eZBeCozOHqtdcwYOpGcPaZNByMFQjryK73K3Pm14","direction":"inbound","twiml":null}'
-  recorded_at: Wed, 23 Jun 2021 09:02:30 GMT
+      string: '{"created_at":"2023-10-20T05:06:28Z","updated_at":"2023-10-20T05:06:28Z","voice_url":"https://demo.twilio.com/docs/voice.xml","voice_method":"GET","status_callback_url":null,"status_callback_method":null,"twiml":null,"to":"1294","from":"+855715100960","sid":"23233573-25be-486d-9631-c33d6f5eb80c","account_sid":"10304d06-de4a-40b5-9453-2ab15ebf5c52","account_auth_token":"LaCY_bLXWZUp9CpFMvBwQiLUn5Kry20lRxOUeERqFPI","direction":"inbound","api_version":"2010-04-01","default_tts_voice":"Basic.Kal"}'
+  recorded_at: Fri, 20 Oct 2023 05:06:28 GMT
 - request:
     method: get
-    uri: https://demo.twilio.com/docs/voice.xml?AccountSid=0f82ec1a-c776-4669-a0b6-c2b11bef156a&ApiVersion=2010-04-01&CallSid=574f0314-8d52-4a79-a7aa-2ff9898f7b79&CallStatus=ringing&Called=1234&Caller=1000&Direction=inbound&From=1000&To=1234
+    uri: https://demo.twilio.com/docs/voice.xml?AccountSid=10304d06-de4a-40b5-9453-2ab15ebf5c52&ApiVersion=2010-04-01&CallSid=23233573-25be-486d-9631-c33d6f5eb80c&CallStatus=ringing&Called=1294&Caller=%2B855715100960&Direction=inbound&From=%2B855715100960&To=1294
     body:
-      encoding: UTF-8
+      encoding: ASCII-8BIT
       string: ''
     headers:
       Content-Type:
@@ -66,7 +68,7 @@ http_interactions:
       Cache-Control:
       - max-age=259200
       X-Twilio-Signature:
-      - YXDSpMZlefngpbgS+wTLaIZ1Ik4=
+      - 1TPqVlvI+EzgGUzcXsHjIF4lAlU=
       Connection:
       - close
       Host:
@@ -77,7 +79,7 @@ http_interactions:
       message: OK
     headers:
       Date:
-      - Wed, 23 Jun 2021 09:02:32 GMT
+      - Fri, 20 Oct 2023 05:06:29 GMT
       Content-Type:
       - text/xml
       Content-Length:
@@ -87,14 +89,13 @@ http_interactions:
       Server:
       - nginx
       Last-Modified:
-      - Mon, 07 Oct 2019 18:46:57 GMT
+      - Tue, 13 Jun 2023 19:18:49 GMT
       Vary:
       - Accept-Encoding
       Etag:
-      - '"5d9b8821-c0"'
+      - '"6488c119-c0"'
       X-Shenanigans:
       - none
-      - none
       Accept-Ranges:
       - bytes
     body:
@@ -102,8 +103,57 @@ http_interactions:
       string: |
         <?xml version="1.0" encoding="UTF-8"?>
         <Response>
-            <Say voice="alice">Thanks for trying our documentation. Enjoy!</Say>
+            <Say voice="woman">Thanks for trying our documentation. Enjoy!</Say>
             <Play>http://demo.twilio.com/docs/classic.mp3</Play>
         </Response>
-  recorded_at: Wed, 23 Jun 2021 09:02:32 GMT
-recorded_with: VCR 6.0.0
+  recorded_at: Fri, 20 Oct 2023 05:06:29 GMT
+- request:
+    method: post
+    uri: http://api.lvh.me:3000/services/tts_events
+    body:
+      encoding: UTF-8
+      string: '{"phone_call":"23233573-25be-486d-9631-c33d6f5eb80c","tts_voice":"Basic.Slt","num_chars":43}'
+    headers:
+      Accept:
+      - application/json
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Faraday v2.7.11
+      Authorization:
+      - Basic c2VydmljZXM6cGFzc3dvcmQ=
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 201
+      message: Created
+    headers:
+      X-Frame-Options:
+      - SAMEORIGIN
+      X-Xss-Protection:
+      - '0'
+      X-Content-Type-Options:
+      - nosniff
+      X-Permitted-Cross-Domain-Policies:
+      - none
+      Referrer-Policy:
+      - strict-origin-when-cross-origin
+      Content-Type:
+      - application/vnd.api+json
+      Cache-Control:
+      - no-cache
+      X-Request-Id:
+      - 5ecc33fd-b6fb-4c51-a946-288f2bb3567b
+      X-Runtime:
+      - '0.034691'
+      Server-Timing:
+      - sql.active_record;dur=8.08, start_processing.action_controller;dur=0.00, instantiation.active_record;dur=0.23,
+        transaction.active_record;dur=8.13, process_action.action_controller;dur=18.49
+      Content-Length:
+      - '0'
+    body:
+      encoding: UTF-8
+      string: ''
+  recorded_at: Fri, 20 Oct 2023 05:06:29 GMT
+recorded_with: VCR 6.2.0
diff --git a/components/app/spec/models/outbound_call_spec.rb b/components/app/spec/models/outbound_call_spec.rb
index 537ec2897..dc437bc0f 100644
--- a/components/app/spec/models/outbound_call_spec.rb
+++ b/components/app/spec/models/outbound_call_spec.rb
@@ -15,6 +15,7 @@
       "account_auth_token" => "sample-auth-token",
       "direction" => "outbound-api",
       "api_version" => "2010-04-01",
+      "default_tts_voice" => "Basic.Kal",
       "routing_parameters" => {
         "destination" => "85516701721",
         "dial_string_prefix" => nil,
@@ -46,6 +47,7 @@
           call_sid: "sample-call-sid",
           direction: "outbound-api",
           api_version: "2010-04-01",
+          default_tts_voice: "Basic.Kal",
           to: "+85516701721",
           from: "2442",
           sip_headers: SIPHeaders.new(
@@ -139,6 +141,7 @@ def build_call_params(params)
       "account_auth_token" => "sample-auth-token",
       "direction" => "outbound-api",
       "api_version" => "2010-04-01",
+      "default_tts_voice" => "Basic.Kal",
       "routing_parameters" => {
         "destination" => "85516701721",
         "dial_string_prefix" => nil,
diff --git a/components/app/spec/support/call_controller_helpers.rb b/components/app/spec/support/call_controller_helpers.rb
index c7ba20634..a7032ede5 100644
--- a/components/app/spec/support/call_controller_helpers.rb
+++ b/components/app/spec/support/call_controller_helpers.rb
@@ -8,6 +8,7 @@ def build_controller(call: build_fake_call, call_properties: {}, **options)
       account_sid: SecureRandom.uuid,
       api_version: "2010-04-01",
       auth_token: SecureRandom.alphanumeric,
+      default_tts_voice: "Basic.Kal",
       from: "1000",
       to: "85512456869"
     )
diff --git a/components/app/spec/support/sucker_punch.rb b/components/app/spec/support/sucker_punch.rb
new file mode 100644
index 000000000..2660c13c3
--- /dev/null
+++ b/components/app/spec/support/sucker_punch.rb
@@ -0,0 +1 @@
+require "sucker_punch/testing/inline"
diff --git a/components/app/spec/web/api_spec.rb b/components/app/spec/web/api_spec.rb
index 19a641607..0c82e578c 100644
--- a/components/app/spec/web/api_spec.rb
+++ b/components/app/spec/web/api_spec.rb
@@ -33,6 +33,7 @@ module Web
               "account_auth_token" => "sample-auth-token",
               "direction" => "outbound-api",
               "api_version" => "2010-04-01",
+              "default_tts_voice" => "Basic.Kal",
               "routing_parameters" => {
                 "destination" => "85516701721",
                 "dial_string_prefix" => nil,
diff --git a/components/freeswitch/bin/aws_polly b/components/freeswitch/bin/aws_polly
index d859f2d6a..d4e40fe18 100755
--- a/components/freeswitch/bin/aws_polly
+++ b/components/freeswitch/bin/aws_polly
@@ -3,12 +3,13 @@
 text="$1"
 file="$2"
 voice_id="$3"
-cache_file="$4"
+engine="$4"
+cache_file="$5"
 
 # Output the text to a file before executing polly
 # https://github.com/somleng/somleng-switch/pull/238
 echo "$text" > "$file.txt"
-aws polly synthesize-speech --sample-rate "8000" --output-format mp3 --voice-id "$voice_id" --text "file://$file.txt" "$file.mp3"
+aws polly synthesize-speech --sample-rate "8000" --output-format mp3 --voice-id "$voice_id" --engine "$engine" --text "file://$file.txt" "$file.mp3"
 
 ffmpeg -i "$file.mp3" "$cache_file"
 ln -s "$cache_file" "$file"
diff --git a/components/freeswitch/bin/cloud_tts b/components/freeswitch/bin/cloud_tts
index a4fb77b74..f4e270df3 100755
--- a/components/freeswitch/bin/cloud_tts
+++ b/components/freeswitch/bin/cloud_tts
@@ -6,6 +6,10 @@ voice="$3"
 cache_file="$4"
 
 if [[ "$voice" =~ ^Polly\..+ ]]; then
-  # extract Polly.from voice and execute aws_polly
-  aws_polly "$text" "$file" "${voice#"Polly."}" "$cache_file"
+  # extract 'Polly.' from voice
+  voice_id_with_engine="${voice#"Polly."}"
+  # extract '-Neural' from voice
+  voice_id="${voice_id_with_engine%"-Neural"}"
+  [[ $voice_id_with_engine = $voice_id ]] && engine="standard" || engine="neural"
+  aws_polly "$text" "$file" "$voice_id" "$engine" "$cache_file"
 fi
diff --git a/components/freeswitch/bin/export_aws_polly_voices b/components/freeswitch/bin/export_aws_polly_voices
deleted file mode 100755
index 523055201..000000000
--- a/components/freeswitch/bin/export_aws_polly_voices
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/usr/bin/env bash
-
-# Modified from:
-# https://starkandwayne.com/blog/bash-for-loop-over-json-array-using-jq/
-
-output_file="$1"
-
-export_polly_voices ()
-{
-  local voices_content=()
-  voices_content+=("<!-- This file is generated automatically by $0. Do not modify. -->")
-
-  for row in $(aws polly describe-voices --query 'Voices' | jq -r '.[] | @base64'); do
-    _jq() {
-      echo ${row} | base64 --decode | jq -r ${1}
-    }
-
-    local name="Polly.$(_jq '.Id')"
-    local language_code="$(_jq '.LanguageCode')"
-    local gender="$(_jq '.Gender')"
-
-    voices_content+=("<voice name=\"$name\" language=\"$language_code\" gender=\"$gender\" prefix=\"tts://tts_commandline|$name|\"/>")
-  done
-
-  printf "%s\n" "${voices_content[@]}" > $output_file
-}
-
-export_polly_voices
diff --git a/components/freeswitch/bin/export_tts_voices b/components/freeswitch/bin/export_tts_voices
new file mode 100755
index 000000000..1dfc126c9
--- /dev/null
+++ b/components/freeswitch/bin/export_tts_voices
@@ -0,0 +1,48 @@
+#!/usr/bin/env ruby
+
+require "bundler/inline"
+
+gemfile do
+  source "https://rubygems.org"
+
+  gem "tts_voices", github: "somleng/tts_voices"
+  gem "ox"
+  gem "gyoku"
+end
+
+class Exporter
+  attr_reader :tts_voices
+
+  def initialize(tts_voices)
+    @tts_voices = tts_voices
+  end
+
+  def result
+    Gyoku.xml("voice/" => voice_tags)
+  end
+
+  private
+
+  def voice_tags
+    tts_voices.each_with_object([]) do |tts_voice, result|
+      result << {
+        "@name": tts_voice.identifier,
+        "@language": tts_voice.language,
+        "@gender": tts_voice.gender,
+        "@prefix": prefix(tts_voice)
+      }
+    end
+  end
+
+  def prefix(tts_voice)
+    if tts_voice.provider == "Basic"
+      "tts://flite|#{tts_voice.name.downcase}|"
+    else
+      "tts://tts_commandline|#{tts_voice.identifier}|"
+    end
+  end
+end
+
+tts_voices = ENV["TTS_VOICES"] == "basic" ? TTSVoices::Voice.basic : TTSVoices::Voice.all
+
+puts Exporter.new(tts_voices).result
diff --git a/components/freeswitch/conf/autoload_configs/polly_voices.xml b/components/freeswitch/conf/autoload_configs/polly_voices.xml
deleted file mode 100644
index 4402ebe40..000000000
--- a/components/freeswitch/conf/autoload_configs/polly_voices.xml
+++ /dev/null
@@ -1,64 +0,0 @@
-<!-- This file is generated automatically by ./export_aws_polly_voices. Do not modify. -->
-<voice name="Polly.Lotte" language="nl-NL" gender="Female" prefix="tts://tts_commandline|Polly.Lotte|"/>
-<voice name="Polly.Maxim" language="ru-RU" gender="Male" prefix="tts://tts_commandline|Polly.Maxim|"/>
-<voice name="Polly.Salli" language="en-US" gender="Female" prefix="tts://tts_commandline|Polly.Salli|"/>
-<voice name="Polly.Geraint" language="en-GB-WLS" gender="Male" prefix="tts://tts_commandline|Polly.Geraint|"/>
-<voice name="Polly.Miguel" language="es-US" gender="Male" prefix="tts://tts_commandline|Polly.Miguel|"/>
-<voice name="Polly.Marlene" language="de-DE" gender="Female" prefix="tts://tts_commandline|Polly.Marlene|"/>
-<voice name="Polly.Giorgio" language="it-IT" gender="Male" prefix="tts://tts_commandline|Polly.Giorgio|"/>
-<voice name="Polly.Ines" language="pt-PT" gender="Female" prefix="tts://tts_commandline|Polly.Ines|"/>
-<voice name="Polly.Zeina" language="arb" gender="Female" prefix="tts://tts_commandline|Polly.Zeina|"/>
-<voice name="Polly.Zhiyu" language="cmn-CN" gender="Female" prefix="tts://tts_commandline|Polly.Zhiyu|"/>
-<voice name="Polly.Gwyneth" language="cy-GB" gender="Female" prefix="tts://tts_commandline|Polly.Gwyneth|"/>
-<voice name="Polly.Karl" language="is-IS" gender="Male" prefix="tts://tts_commandline|Polly.Karl|"/>
-<voice name="Polly.Joanna" language="en-US" gender="Female" prefix="tts://tts_commandline|Polly.Joanna|"/>
-<voice name="Polly.Lucia" language="es-ES" gender="Female" prefix="tts://tts_commandline|Polly.Lucia|"/>
-<voice name="Polly.Cristiano" language="pt-PT" gender="Male" prefix="tts://tts_commandline|Polly.Cristiano|"/>
-<voice name="Polly.Astrid" language="sv-SE" gender="Female" prefix="tts://tts_commandline|Polly.Astrid|"/>
-<voice name="Polly.Vicki" language="de-DE" gender="Female" prefix="tts://tts_commandline|Polly.Vicki|"/>
-<voice name="Polly.Mia" language="es-MX" gender="Female" prefix="tts://tts_commandline|Polly.Mia|"/>
-<voice name="Polly.Bianca" language="it-IT" gender="Female" prefix="tts://tts_commandline|Polly.Bianca|"/>
-<voice name="Polly.Vitoria" language="pt-BR" gender="Female" prefix="tts://tts_commandline|Polly.Vitoria|"/>
-<voice name="Polly.Raveena" language="en-IN" gender="Female" prefix="tts://tts_commandline|Polly.Raveena|"/>
-<voice name="Polly.Chantal" language="fr-CA" gender="Female" prefix="tts://tts_commandline|Polly.Chantal|"/>
-<voice name="Polly.Amy" language="en-GB" gender="Female" prefix="tts://tts_commandline|Polly.Amy|"/>
-<voice name="Polly.Brian" language="en-GB" gender="Male" prefix="tts://tts_commandline|Polly.Brian|"/>
-<voice name="Polly.Kevin" language="en-US" gender="Male" prefix="tts://tts_commandline|Polly.Kevin|"/>
-<voice name="Polly.Russell" language="en-AU" gender="Male" prefix="tts://tts_commandline|Polly.Russell|"/>
-<voice name="Polly.Aditi" language="en-IN" gender="Female" prefix="tts://tts_commandline|Polly.Aditi|"/>
-<voice name="Polly.Matthew" language="en-US" gender="Male" prefix="tts://tts_commandline|Polly.Matthew|"/>
-<voice name="Polly.Dora" language="is-IS" gender="Female" prefix="tts://tts_commandline|Polly.Dora|"/>
-<voice name="Polly.Enrique" language="es-ES" gender="Male" prefix="tts://tts_commandline|Polly.Enrique|"/>
-<voice name="Polly.Hans" language="de-DE" gender="Male" prefix="tts://tts_commandline|Polly.Hans|"/>
-<voice name="Polly.Carmen" language="ro-RO" gender="Female" prefix="tts://tts_commandline|Polly.Carmen|"/>
-<voice name="Polly.Ivy" language="en-US" gender="Female" prefix="tts://tts_commandline|Polly.Ivy|"/>
-<voice name="Polly.Ewa" language="pl-PL" gender="Female" prefix="tts://tts_commandline|Polly.Ewa|"/>
-<voice name="Polly.Maja" language="pl-PL" gender="Female" prefix="tts://tts_commandline|Polly.Maja|"/>
-<voice name="Polly.Nicole" language="en-AU" gender="Female" prefix="tts://tts_commandline|Polly.Nicole|"/>
-<voice name="Polly.Gabrielle" language="fr-CA" gender="Female" prefix="tts://tts_commandline|Polly.Gabrielle|"/>
-<voice name="Polly.Camila" language="pt-BR" gender="Female" prefix="tts://tts_commandline|Polly.Camila|"/>
-<voice name="Polly.Filiz" language="tr-TR" gender="Female" prefix="tts://tts_commandline|Polly.Filiz|"/>
-<voice name="Polly.Jacek" language="pl-PL" gender="Male" prefix="tts://tts_commandline|Polly.Jacek|"/>
-<voice name="Polly.Justin" language="en-US" gender="Male" prefix="tts://tts_commandline|Polly.Justin|"/>
-<voice name="Polly.Celine" language="fr-FR" gender="Female" prefix="tts://tts_commandline|Polly.Celine|"/>
-<voice name="Polly.Kendra" language="en-US" gender="Female" prefix="tts://tts_commandline|Polly.Kendra|"/>
-<voice name="Polly.Ricardo" language="pt-BR" gender="Male" prefix="tts://tts_commandline|Polly.Ricardo|"/>
-<voice name="Polly.Mads" language="da-DK" gender="Male" prefix="tts://tts_commandline|Polly.Mads|"/>
-<voice name="Polly.Mathieu" language="fr-FR" gender="Male" prefix="tts://tts_commandline|Polly.Mathieu|"/>
-<voice name="Polly.Lea" language="fr-FR" gender="Female" prefix="tts://tts_commandline|Polly.Lea|"/>
-<voice name="Polly.Naja" language="da-DK" gender="Female" prefix="tts://tts_commandline|Polly.Naja|"/>
-<voice name="Polly.Penelope" language="es-US" gender="Female" prefix="tts://tts_commandline|Polly.Penelope|"/>
-<voice name="Polly.Tatyana" language="ru-RU" gender="Female" prefix="tts://tts_commandline|Polly.Tatyana|"/>
-<voice name="Polly.Olivia" language="en-AU" gender="Female" prefix="tts://tts_commandline|Polly.Olivia|"/>
-<voice name="Polly.Ruben" language="nl-NL" gender="Male" prefix="tts://tts_commandline|Polly.Ruben|"/>
-<voice name="Polly.Mizuki" language="ja-JP" gender="Female" prefix="tts://tts_commandline|Polly.Mizuki|"/>
-<voice name="Polly.Takumi" language="ja-JP" gender="Male" prefix="tts://tts_commandline|Polly.Takumi|"/>
-<voice name="Polly.Conchita" language="es-ES" gender="Female" prefix="tts://tts_commandline|Polly.Conchita|"/>
-<voice name="Polly.Carla" language="it-IT" gender="Female" prefix="tts://tts_commandline|Polly.Carla|"/>
-<voice name="Polly.Kimberly" language="en-US" gender="Female" prefix="tts://tts_commandline|Polly.Kimberly|"/>
-<voice name="Polly.Jan" language="pl-PL" gender="Male" prefix="tts://tts_commandline|Polly.Jan|"/>
-<voice name="Polly.Liv" language="nb-NO" gender="Female" prefix="tts://tts_commandline|Polly.Liv|"/>
-<voice name="Polly.Joey" language="en-US" gender="Male" prefix="tts://tts_commandline|Polly.Joey|"/>
-<voice name="Polly.Lupe" language="es-US" gender="Female" prefix="tts://tts_commandline|Polly.Lupe|"/>
-<voice name="Polly.Seoyeon" language="ko-KR" gender="Female" prefix="tts://tts_commandline|Polly.Seoyeon|"/>
-<voice name="Polly.Emma" language="en-GB" gender="Female" prefix="tts://tts_commandline|Polly.Emma|"/>
diff --git a/components/freeswitch/conf/autoload_configs/ssml.conf.xml b/components/freeswitch/conf/autoload_configs/ssml.conf.xml
index ffe1f1fb9..30948584f 100644
--- a/components/freeswitch/conf/autoload_configs/ssml.conf.xml
+++ b/components/freeswitch/conf/autoload_configs/ssml.conf.xml
@@ -3,9 +3,7 @@
 <configuration name="ssml.conf" description="SSML parser config">
   <!-- voices in order of preference -->
   <tts-voices>
-    <voice name="man" language="en-US" gender="male" prefix="tts://flite|kal|"/>
-    <voice name="woman" language="en-US" gender="female" prefix="tts://flite|slt|"/>
-    <X-PRE-PROCESS cmd="include" data="polly_voices.xml"/>
+    <X-PRE-PROCESS cmd="include" data="tts_voices.xml"/>
   </tts-voices>
 
   <!-- maps ISO language to say module -->
diff --git a/components/freeswitch/conf/autoload_configs/tts_voices.xml b/components/freeswitch/conf/autoload_configs/tts_voices.xml
new file mode 100644
index 000000000..d91412720
--- /dev/null
+++ b/components/freeswitch/conf/autoload_configs/tts_voices.xml
@@ -0,0 +1,3 @@
+<!-- This file is generated automatically. Do not modify. -->
+<voice name="Basic.Kal" language="en-US" gender="Male" prefix="tts://flite|kal|"/>
+<voice name="Polly.Lotte" language="nl-NL" gender="Female" prefix="tts://tts_commandline|Polly.Lotte|"/>
diff --git a/components/freeswitch/tests/bin/export_tts_voices_test.rb b/components/freeswitch/tests/bin/export_tts_voices_test.rb
new file mode 100755
index 000000000..0d9a61d54
--- /dev/null
+++ b/components/freeswitch/tests/bin/export_tts_voices_test.rb
@@ -0,0 +1,16 @@
+#!/usr/bin/env ruby
+
+require "test/unit"
+require "pathname"
+require "open3"
+
+class ExporterTest < Test::Unit::TestCase
+  def test_export
+    script = File.expand_path(File.join(__dir__, "../../bin/export_tts_voices"))
+    stdout, status = Open3.capture2({ "TTS_VOICES" => "basic" }, script)
+
+    assert(status.success?)
+    assert(stdout.include?('<voice name="Basic.Kal" language="en-US" gender="Male" prefix="tts://flite|kal|"/>'))
+    assert(stdout.include?('<voice name="Basic.Slt" language="en-US" gender="Female" prefix="tts://flite|slt|"/>'))
+  end
+end
diff --git a/components/freeswitch/tests/tests.sh b/components/freeswitch/tests/tests.sh
index 584c363f8..3ca487f48 100755
--- a/components/freeswitch/tests/tests.sh
+++ b/components/freeswitch/tests/tests.sh
@@ -9,6 +9,6 @@ echo "Running tests..."
 
 current_dir=$(dirname "$(readlink -f "$0")")
 
-for f in $current_dir/bin/*.sh; do
-  sh "$f"
+for f in $current_dir/bin/*; do
+  $f
 done
diff --git a/components/gateway/Dockerfile b/components/gateway/Dockerfile
index 4567fb8c7..4e01de624 100644
--- a/components/gateway/Dockerfile
+++ b/components/gateway/Dockerfile
@@ -1,4 +1,6 @@
-FROM debian:bullseye-slim AS bootstrap
+# https://apt.opensips.org/packages.php?os=bookworm
+
+FROM public.ecr.aws/debian/debian:bookworm-slim AS bootstrap
 
 USER root
 
@@ -7,13 +9,13 @@ ENV DEBIAN_FRONTEND noninteractive
 ARG OPENSIPS_VERSION=3.3
 ARG OPENSIPS_BUILD=releases
 
-RUN apt-get -y update -qq && apt-get -y install gnupg2 ca-certificates
-RUN apt-key adv --fetch-keys https://apt.opensips.org/pubkey.gpg
-RUN echo "deb https://apt.opensips.org bullseye ${OPENSIPS_VERSION}-${OPENSIPS_BUILD}" > /etc/apt/sources.list.d/opensips.list
-RUN echo "deb https://apt.opensips.org bullseye cli-nightly" > /etc/apt/sources.list.d/opensips-cli.list
-RUN apt-get -y update -qq && apt-get -y install opensips opensips-postgres-module opensips-cli python3-psycopg2 m4
-
-RUN rm -rf /var/lib/apt/lists/*
+RUN apt-get -y update -qq && apt-get -y install gnupg2 ca-certificates curl && \
+    curl https://apt.opensips.org/opensips-org.gpg -o /usr/share/keyrings/opensips-org.gpg && \
+    echo "deb [signed-by=/usr/share/keyrings/opensips-org.gpg] https://apt.opensips.org bookworm ${OPENSIPS_VERSION}-${OPENSIPS_BUILD}" >/etc/apt/sources.list.d/opensips.list && \
+    echo "deb [signed-by=/usr/share/keyrings/opensips-org.gpg] https://apt.opensips.org bookworm cli-nightly" >/etc/apt/sources.list.d/opensips-cli.list && \
+    apt-get -y update -qq && apt-get -y install opensips opensips-postgres-module opensips-cli python3-psycopg2 python3-sqlalchemy python3-sqlalchemy-utils && \
+    apt-get purge -y --auto-remove curl && \
+    rm -rf /var/lib/apt/lists/*
 
 COPY bootstrap.sh /docker-entrypoint.sh
 
@@ -28,7 +30,7 @@ CMD ["create_db"]
 
 # Build
 
-FROM debian:bullseye-slim AS build
+FROM public.ecr.aws/debian/debian:bookworm-slim AS build
 
 USER root
 
@@ -37,12 +39,11 @@ ENV DEBIAN_FRONTEND noninteractive
 ARG OPENSIPS_VERSION=3.3
 ARG OPENSIPS_BUILD=releases
 
-RUN apt-get -y update -qq && apt-get -y install gnupg2 ca-certificates iproute2
-RUN apt-key adv --fetch-keys https://apt.opensips.org/pubkey.gpg
-RUN echo "deb https://apt.opensips.org bullseye ${OPENSIPS_VERSION}-${OPENSIPS_BUILD}" >/etc/apt/sources.list.d/opensips.list
-RUN apt-get -y update -qq && apt-get -y install opensips opensips-postgres-module opensips-auth-modules netcat jq curl
-
-RUN rm -rf /var/lib/apt/lists/*
+RUN apt-get -y update -qq && apt-get -y install gnupg2 ca-certificates iproute2 curl netcat-traditional jq && \
+    curl https://apt.opensips.org/opensips-org.gpg -o /usr/share/keyrings/opensips-org.gpg && \
+    echo "deb [signed-by=/usr/share/keyrings/opensips-org.gpg] https://apt.opensips.org bookworm ${OPENSIPS_VERSION}-${OPENSIPS_BUILD}" >/etc/apt/sources.list.d/opensips.list && \
+    apt-get -y update -qq && apt-get -y install opensips opensips-postgres-module opensips-auth-modules && \
+    rm -rf /var/lib/apt/lists/*
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["opensips"]
@@ -60,4 +61,3 @@ FROM build AS client_gateway
 
 COPY client_gateway/opensips.cfg /etc/opensips/opensips.cfg
 COPY client_gateway/docker-entrypoint.sh /docker-entrypoint.sh
-
diff --git a/components/gateway/bootstrap.sh b/components/gateway/bootstrap.sh
index 50330507d..be515ffcc 100755
--- a/components/gateway/bootstrap.sh
+++ b/components/gateway/bootstrap.sh
@@ -6,8 +6,8 @@
 
 set -e
 
-ADMIN_DATABASE_URL="postgres://$DATABASE_USERNAME:$DATABASE_PASSWORD@$DATABASE_HOST:$DATABASE_PORT/postgres"
-DATABASE_URL="postgres://$DATABASE_USERNAME:$DATABASE_PASSWORD@$DATABASE_HOST:$DATABASE_PORT"
+ADMIN_DATABASE_URL="postgresql://$DATABASE_USERNAME:$DATABASE_PASSWORD@$DATABASE_HOST:$DATABASE_PORT/postgres"
+DATABASE_URL="postgresql://$DATABASE_USERNAME:$DATABASE_PASSWORD@$DATABASE_HOST:$DATABASE_PORT"
 
 if [ "$1" = 'create_db' ]; then
   if [ "$2" = 'public_gateway' ]; then
diff --git a/components/testing/Dockerfile b/components/testing/Dockerfile
index 031264c77..b81c07645 100644
--- a/components/testing/Dockerfile
+++ b/components/testing/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM public.ecr.aws/docker/library/alpine:latest
 
 RUN apk update && apk upgrade && apk add --update --no-cache sipp curl postgresql-client bind-tools
 
diff --git a/components/testing/tests/client_gateway/outbound_proxy_test.sh b/components/testing/tests/client_gateway/outbound_proxy_test.sh
index 1cf65d614..85a71409b 100755
--- a/components/testing/tests/client_gateway/outbound_proxy_test.sh
+++ b/components/testing/tests/client_gateway/outbound_proxy_test.sh
@@ -31,6 +31,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice": "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,
diff --git a/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh b/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh
index 40cc6e8e5..1bf33e789 100755
--- a/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh
+++ b/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh
@@ -30,6 +30,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice": "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,
diff --git a/components/testing/tests/public_gateway/alternative_outbound_test.sh b/components/testing/tests/public_gateway/alternative_outbound_test.sh
index 0422c4c6a..8c0a2763a 100755
--- a/components/testing/tests/public_gateway/alternative_outbound_test.sh
+++ b/components/testing/tests/public_gateway/alternative_outbound_test.sh
@@ -22,6 +22,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice": "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,
diff --git a/components/testing/tests/public_gateway/outbound_test.sh b/components/testing/tests/public_gateway/outbound_test.sh
index a3434d55c..7a81a338c 100755
--- a/components/testing/tests/public_gateway/outbound_test.sh
+++ b/components/testing/tests/public_gateway/outbound_test.sh
@@ -24,6 +24,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice": "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,
diff --git a/docker-compose.yml b/docker-compose.yml
index 6d07140bf..ebfcc19a4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -16,6 +16,7 @@ services:
       context: components/gateway
       target: bootstrap
     image: gateway:bootstrap
+    platform: linux/amd64
     environment:
       DATABASE_USERNAME: "postgres"
       DATABASE_PASSWORD:
@@ -30,6 +31,7 @@ services:
       context: components/gateway
       target: public_gateway
     image: public_gateway:latest
+    platform: linux/amd64
     environment:
       DATABASE_URL: "postgres://postgres:@host.docker.internal:5432/opensips_public_gateway_test"
       FIFO_NAME: /opensips/fifo/public_gateway
@@ -51,6 +53,7 @@ services:
       context: components/gateway
       target: client_gateway
     image: client_gateway:latest
+    platform: linux/amd64
     environment:
       DATABASE_URL: "postgres://postgres:@host.docker.internal:5432/opensips_client_gateway_test"
       FIFO_NAME: /opensips/fifo/client_gateway
@@ -70,6 +73,7 @@ services:
     build:
       context: components/media_proxy
     image: media_proxy:latest
+    platform: linux/amd64
     extra_hosts:
       - "host.docker.internal:host-gateway"
     healthcheck:
@@ -84,6 +88,7 @@ services:
     build:
       context: components/freeswitch
     image: freeswitch:latest
+    platform: linux/amd64
     environment:
       FS_EXTERNAL_RTP_IP: "13.250.230.15"
       FS_ALTERNATIVE_RTP_IP: "18.141.245.230"
@@ -103,6 +108,7 @@ services:
     build:
       context: components/app
     image: switch-app:latest
+    platform: linux/amd64
     environment:
       AHN_CORE_HOST: freeswitch
       CALL_PLATFORM_STUB_RESPONSES: "true"
diff --git a/infrastructure/modules/somleng_switch/switch.tf b/infrastructure/modules/somleng_switch/switch.tf
index 019b91870..754422ffb 100644
--- a/infrastructure/modules/somleng_switch/switch.tf
+++ b/infrastructure/modules/somleng_switch/switch.tf
@@ -279,6 +279,7 @@ resource "aws_iam_policy" "ecs_task_policy" {
     {
       "Effect": "Allow",
       "Action": [
+        "polly:DescribeVoices",
         "polly:SynthesizeSpeech"
       ],
       "Resource": "*"