Page 76 of 910 Features
553-3001-365 Standard 4.00 August 2005
The ACF feature for IP Phones allows active IP calls to survive the following
failures:
• IP/IP calls and IP/TDM calls survive signaling path TLAN subnet
failures.
Note: IP/IP calls means both parties are IP Phones. IP/TDM calls means
one party is an IP Phone and the other party is a TDM telephone or trunk.
• IP and IP/TDM calls survive Signaling Server restarts.
Note: The IP/TDM call does not survive if the Voice Gateway Media
Card with the DSP resource used for the call fails.
• IP and IP/TDM calls survive LTPS ELAN subnet failures.
• IP calls survive a Call Server cold start and Call Server failures in system
configurations with a redundant Call Server of the following types (see
Note 1 on page 77):
— CS 1000S systems with an alternate Call Server when the primary
Call Server fails
— Media Gateway 1000B for a branch office configuration
— Geographic Redundancy Secondary Call Server. The feature
addresses the Primary Call Server failures.