Telephone channel

To create a phone channel in a project you need to have added at least one connection.

Connection

Navigate to the project > click on Channels in the toolbar. In the Telephony section click on Create channel.

Fill in the fields:

Name — Specify the channel name.
SIP-trunk connection — select a connection. The connection is created during the telephony setup.
Allow incoming calls — enable this checkbox if you want incoming calls to be received.

You can create multiple outbound channels for a single connection. There can be only one channel that will accept incoming calls per connection.

Record calls — enable the checkbox if you want to record and store the calls made.

Calls are stored for six months. The log records of calls are stored for a year.

Branch — specify the project branch which you want to allocate to the channel. The default setting is master.
Deploy — select Automatic (whenever any change made to the project is saved) or Manual (using the Publish button in the channel description line).

Please note the Deploy radio button. You have to deploy a script before starting the chatbot. At this stage, the system builds the chatbot, checks script syntax and performs tests.

Extension — if the Allow incoming calls checkbox is enabled, then specify the number that the client should dial to initiate the bot’s script.

Go to ASR and TTS, or press Create, in this case the providers for synthesis and recognition will be selected by default.

ASR and TTS by default

The default settings for ASR and TTS depend on the NLU language you selected at the stage of its creation:

Language	ASR	TTS	Parameters
Russian	Tinkoff	Yandex	Default settings are used
English Chinese Portuguese	Google	Google	Default settings are used

ASR and TTS provider selection

Bots that make and receive calls use speech synthesis and recognition:

Text-To-Speech (TTS) or speech synthesis - the process of speech generation from printed text.
Automatic Speech Recognition (ASR) or speech recognition - the process of converting speech into text.

When creating a telephone channel, you can select providers for ASR and TTS. To do this, go to the ASR tab and select the connection, then do the same for TTS.

Please note that if you choose a specific provider for ASR and TTS, in case of problems, you need to switch the channel yourself to another provider.

You can also leave the option By default, in this case the settings of the most stable ASR and TTS providers will be automatically applied. In case of problems with providers, the channel will be switched to another provider.

Press Create. The created channel will be displayed in the list.

Editing

To edit the data of a telephone channel click on the Click on "more details" icon to edit the channel icon > Edit channel. Make changes > Save.

Deleting

To delete a channel click on the Click on "more details" icon to delete the channel icon > Remove channel, then confirm deletion.