TeXML Fundamentals

Overview

TeXML is an XML-based markup language to define call control and processing instructions. When properly configured, Telnyx will fetch TeXML instructions from the user’s application and process the calls accordingly. See Verbs & Nouns.

TeXML Application

An instance of TeXML Application is a collection of configuration parameters that defines the interaction between Telnyx and the user’s application:

Field	Description
Application Name	A descriptive name to identify your TeXML application.
AnchorSite	Defines preferable data center for handling the traffic. In case of `latency` ICMP ping to the webhook URL address will be used to calculate the closed data center.
Voice method	HTTP method that will be used to interact with your webhooks
Webhook URL	The URL where Telnyx will fetch TeXML instructions when a call is initiated. The instruction can be served by Telnyx. In that case select `TeXML bin URL`. See TeXML bin quickstart for more details.
Webhook Failover URL	A backup URL that Telnyx will use if the primary webhook URL fails to respond
Call progress events URL	URL where Telnyx will send event callbacks related to your calls
Status Callback Method	HTTP method (GET or POST) used for status callbacks
Hang-up on timeout	Specifies the number of seconds Telnyx will wait for initial application response before hanging up
DTMF Type	Configuration for how DTMF (touch-tone) inputs are handled
Enable Call Cost	Specify if the call cost webhook should be sent

A TeXML Application can be created through the Telnyx Mission Control Portal or via the Telnyx API.

Instruction Fetching

See Instruction Fetching.

Twilio Compatibility

See Twilio Compatibility.

Guides

Markup Language

API Reference

For AI Agents

TeXML Fundamentals

Overview

TeXML Application

Instruction Fetching

Twilio Compatibility

​Overview

​TeXML Application

​Instruction Fetching

​Twilio Compatibility

Overview

TeXML Application

Instruction Fetching

Twilio Compatibility