Branch Gateway provides a telephone exchange service, supporting the connection of various phone types and outside telephone lines. Phones and lines are connected to Branch Gateway through media modules on the chassis. Different media modules provide access ports for different phone types and lines.

Telephony services are controlled by a Media Gateway Controller (MGC) running Communication Manager call processing software. You can use Communication Manager to configure advanced telephone exchange features. For more information about Branch Gateway telephony services, see Administering Avaya Aura® Communication Manager.