Cisco Cisco IOS Software Release 12.2(8)T
ATM Software Segmentation and Reassembly (SAR)
Configuration Tasks for AAL2 Trunking with CAS
15
Cisco IOS Release 12.2(8)T
Note
When verifying your ATM PVC connectivity, note that you cannot enter the ping command over a
voice PVC, because the command applies to data only. If you have data and voice PVCs set to the
same destination, you can enter the ping command over the data PVC.
voice PVC, because the command applies to data only. If you have data and voice PVCs set to the
same destination, you can enter the ping command over the data PVC.
Configuring Voice Band Detection Playout Settings
To configure voice band detection playout buffer delay on Cisco 2600 series and Cisco 3600 series
routers , use the following commands beginning in the voice service configuration mode:
routers , use the following commands beginning in the voice service configuration mode:
Command
Purpose
Step 1
Router(config)# voice service voatm
Enters voice-service configuration mode.
Step 2
Router(config-voice-service)# session protocol aal2
Enters voice-service-session configuration mode
and specifies AAL2 trunking.
and specifies AAL2 trunking.
Step 3
Router(config-voice-service-session)#
vbd-playout-delay maximum
time
Specifies the maximum AAL2 voice band detection
playout delay buffer on Cisco 2600 series and
Cisco 3660 routers in milliseconds.
playout delay buffer on Cisco 2600 series and
Cisco 3660 routers in milliseconds.
The time is set in milliseconds. The range is from
40-1700 milliseconds. The default is set to 200
milliseconds.
40-1700 milliseconds. The default is set to 200
milliseconds.
Step 4
Router(config-voice-service-session)#
vbd-playout-delay minimum
time
Specifies the minimum AAL2 voice band detection
playout delay buffer on Cisco 2600 series and
Cisco 3660 routers.
playout delay buffer on Cisco 2600 series and
Cisco 3660 routers.
The time is set in milliseconds. The range is from
4-1700 milliseconds. The default is set to 4
milliseconds.
4-1700 milliseconds. The default is set to 4
milliseconds.
Step 5
Router(config-voice-service-session)#
vbd-playout-delay mode {fixed | passthrough}
Configures voice band detection playout delay
adaptation mode on a Cisco router.
adaptation mode on a Cisco router.
When the vbd-delay-playout mode is set to fixed,
jitter buffer is set at a constant delay in milliseconds.
jitter buffer is set at a constant delay in milliseconds.
When the vbd-delay-playout mode is set to
passthrough, jitter buffer is set to DRAIN_FILL for
clock compensation. There is no default.
passthrough, jitter buffer is set to DRAIN_FILL for
clock compensation. There is no default.
Step 6
Router(config-voice-service-session)#
vbd-playout-delay nominal
time
Specifies the nominal AAL2 voice band detection
playout delay buffer on Cisco 2600 series and
Cisco 3660 routers.
playout delay buffer on Cisco 2600 series and
Cisco 3660 routers.
The time is set in milliseconds. The range is from
0-1500 milliseconds. The default is 100
milliseconds.
0-1500 milliseconds. The default is 100
milliseconds.
Step 7
Router(config-voice-service-session)# end
Exits voice-service-session configuration mode.