Protocol Version

Last Updated : Jul 28, 2021 |

Available only when:

  • The Signaling Mode is isdn-pri and the Connect type is network.

  • The Signaling Mode is isdn-pri, the Connect type is pbx, and the Interface type is user or network.

Valid Entry

Usage

a, b, c, d

Selects the protocol that matches the network service provider’s protocol in countries whose public networks allow multiple layer-3 signaling protocols for ISDN-PRI service. Contact the network service provider to verify that the protocols match.
Warning:

The AT&T Switched Network Protocol prohibits restricted displays of connected numbers. Display problems occur if you administer the 1a country-protocol/ protocol-version combination on the DS1 screen and administer the ISDN-PRI Trunk Group to restrict sending the connected number.