Amazon Lex V2

The Amazon Lex V2 bot service lets you create and host bots in AWS cloud.

Please refer to Amazon documentation for building your bot.

Here we will introduce some basic concepts needed to integrate your bot to VoiceAI Connect.

Basic concepts

Intents

Intents are conversation flows in Lex V2. An intent can be triggered with a pre-defined set of sentences.

For example, "Track a package" flow is an intent, which can be triggered with the following utterances:

Where is my package
I want to check my package location
When will my package arrive

Activities

An activity is a control command sent to Voice AI Connect and not to the end user (e.g. Start recording, switch language etc.)

For more information on activities, see Sending activities to VoiceAI Connect

Notifications

A notification is a message sent from Voice AI Connect to the bot, but is not necessarily related to the current intent (e.g. no user input event). See Receiving the notification

Event names can be used in <angle-brackets> as sample utterances to trigger an intent, but to extract the data send with the event, a lambda is needed.

You can check the Receiving notifications from VoiceAI Connect to Lex V2 bot for a complete example.

Parameters description

The following table lists the bot parameters that are used to configure this feature:

Parameter	Type	Description
`lexBotDummyMessageIntervalMS`	Number	Defines the interval (in milliseconds) at which a dummy text message is sent to the bot. The contents of this message are defined in the `lexBotDummyMessageText` parameter. The purpose of this message is to keep the Lex bot connection alive during long periods of inactivity. It is recommended to set this parameter to 60000, as Lex bot times out its connections after approximately 90 seconds. The bot must be able to identify and ignore this message. The default is 0 (i.e., no timeout for bot response). This feature is applicable to VoiceAI Connect Enterprise Version 3.24.5 and later.
`lexBotDummyMessageText`	String	Defines the content of the dummy text message sent when `lexBotDummyMessageIntervalMS` is configured. The default is "<keep alive>" This feature is applicable to VoiceAI Connect Enterprise Version 3.24.5 and later.

Parameter

Type

Description

lexBotDummyMessageIntervalMS

Number

Defines the interval (in milliseconds) at which a dummy text message is sent to the bot. The contents of this message are defined in the lexBotDummyMessageText parameter. The purpose of this message is to keep the Lex bot connection alive during long periods of inactivity. It is recommended to set this parameter to 60000, as Lex bot times out its connections after approximately 90 seconds. The bot must be able to identify and ignore this message.

The default is 0 (i.e., no timeout for bot response).

This feature is applicable to VoiceAI Connect Enterprise Version 3.24.5 and later.

lexBotDummyMessageText

String

Defines the content of the dummy text message sent when lexBotDummyMessageIntervalMS is configured.

The default is "<keep alive>"

This feature is applicable to VoiceAI Connect Enterprise Version 3.24.5 and later.