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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
Chapter4 Configuring VISM Features
Configuring Additional VISM Features
Step 13 Type the cnfsessyncatmps command, session-num and max-sync-attempts argument values, and press
Enter to configure the maximum number of attempts to synchronize VISM with the call agent. Specify the
arguments with the following values:
•session-num: Type the value entered for the session-num argument in Step 4.
•max-sync-attempts: In the range from 1 to 32
Step 14 Repeat Step 4 through Step 13 for all additional session numbers, as required for your application.
You have completed configuring ISDN PRI backhaul.
The basic configuration of your VISM cards is complete. Use the configuration instructions in this
chapter to reconfigure VISM for your application needs as they chan ge. Use the commands described in
Chapter5, “CLI Commands,” to further configure your V ISM c ards, if nec essary.
Configuring Additional VISM Features
The following features are available for users of VISM 3.0 and higher:
•Support for the MGCP 0.1 subset of the MGCP 1.0 protocol
Note The restart method (RM) is not defined as part of the MGCP 0.1 su bse t, an d is not
supported.
•Verified MGCP 0.1 protocol compliance
•PBX CAS event delivery to a call agent using MGCP 0.1:
–
DTMF: Wink and ground start
–
MF: Wink
–
TFTP download of CAS variant state machine
Note RFC 3064 CAS packages—BL, MS, and DT—are not supported.
•Interoperability enhancements:
–
Configurable codec strings (IANA naming conventions as well as customized ones)
–
Codec negotiation with configurable preference order
•Exponential backoff for:
–
XGCP retry timers
–
SRCP retry timers
–
Configurable per CAS variant
•DTMF Relay using Cisco-rtp (FRF-11 Annex A based)
•Enhancement to Fax/modem up-speed/pass-through procedures:
–
Configurable CAC failure and carrier loss policies
–
Up-speed to clear channel