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Cisco uBR924 Software Configuration Guide
OL-0337-05 (8/2002)
Chapter 4 Voice over IP Configurations
MGCP Configuration
Step 11
ubr924(config)# mgcp dtmf-relay { codec | low-bit-rate }
mode { cisco | out-of-band }
(Optional) Enables the accurate forwarding of
touchtone digits during a voice call. Use codec to
specify the G.711 codec or low-bit-rate to specify
the G.729 codec. Use a mode of cisco to transmit the
tones with the Cisco proprietary method; if the
remote gateway is not a Cisco router, use
out-of-band instead.
Step 12
ubr924(config)# mgcp ip-tos { high-reliability |
high-throughput | low-cost | low-delay | precedence
value }
(Optional) Enable IP Type of Services (TOS) for the
voice connections, and specify the value for the IP
precedence bit (the default IP precedence is 3).
Step 13
ubr924(config)# mgcp max-waiting-delay value (Optional) Specify the number of milliseconds to
wait after a restart (default of 3000) before
connecting with the call agent. If used, these values
should be staggered among gateways to avoid
having large numbers of gateways connecting with
the call agent at the same time after a mass restart.
Step 14
ubr924(config)# mgcp modem passthru { cisco | ca } (Optional) Enable the transmission and reception of
modem and fax data. If the remote gateway is a
Cisco router, specify cisco; otherwise, specify ca
(default) to allow the data to pass-through the
call-agent.
Step 15
ubr924(config)# mgcp package-capability { line-package |
dtmf-package | gm-package | rtp-package }
(Optional) Specify that the Cisco uBR924 router
supports a particular package capability. Give this
command multiple times to enable multiple
packages. Use this command before using the mgcp
default-package command.
Step 16
ubr924(config)# mgcp default-package { line-package |
dtmf-package | gm-package }
(Optional) Specify the default package type for the
media gateway; defaults to line-package.
Step 17
ubr924(config)# mgcp playout { adaptive init-value
min-value max-value | fixed init-value }
(Optional) Change the jitter buffer packet size in
milliseconds for MGCP calls, using either an
adaptive range or a fixed value. The default is
adaptive 60 4 200.
Step 18
ubr924(config)# mgcp request retries count (Optional) Specify the number of times a call
request message is transmitted to a call agent before
timing out. The default is 3 times.
Step 19
ubr924(config)# mgcp request timeout timeout (Optional) Specify the number of milliseconds to
wait for a response to a request before retransmitting
or timing out the request. The default is 500
milliseconds.
Step 20
ubr924(config)# mgcp restart-delay value (Optional) Specify the value (in seconds) used in
Restart in Progress (RSIP) messages to indicate the
delay before the connection is torn down. The
default delay is 0 seconds.
Step 21
ubr924(config)# mgcp vad (Optional) Enable Voice Activity Detection (VAD)
to turn silence suppression on. The default disables
VA D.
Command Purpose