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https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/30141-symptoms.html#anc14

https://www.cisco.com/c/en/us/support/docs/voice/digital-cas/14007-net-signal-control.html

DSP Debuging

https://www.cisco.com/c/en/us/support/docs/voice/digital-signal-processing-dsp/118020-technote-pvdm-00.html

Testing voice driver with hidden command “test voice driver”

Add and removing DSP.

Testing

test voice port 2/0 thl-sweep verbose

test voice port 2/0 inject-tone local 1000hz
test voice port 2/0 inject-tone local disable

test voice port 2/0 inject-tone network 1000hz
test voice port 2/0 inject-tone network disable

voicehub# show dialplan number 5000
….
voicehub# csim start 5000
csim: called number = 5000, loop count = 1 ping count = 0
csim err csimDisconnected recvd DISC cid(5)
csim: loop = 1, failed = 1
csim: call attempted = 1, setup failed = 1, tone failed = 0



voicehub# csim start 5000
csim: called number = 5000, loop count = 1 ping count = 0
csim err csimDisconnected recvd DISC cid(5)
csim: loop = 1, failed = 1
csim: call attempted = 1, setup failed = 1, tone failed = 0


Showing

show call history voice
show dialplan number
show call active voice compact
show voice port summary
show ccm-manager

test voice translation-rule

DEBUGGING

debug isdn q931
debug ccsip messages
debug voip dialpeer all
debug voice ccapi inout

#show voice dsp active

#test voice port 2/0 read all

IAD2431-16FXS#test voice port 2/0 relay power-denial on
IAD2431-16FXS#test voice port 2/0 relay power-denial off

IAD2431#show voice call status 112
Gathering information (10 seconds)…
CallID Port DSP/Ch Codec Rx/Tx En/De ERL/Reflctr Jitter
0x112 2/0 0/1:1 g711ulaw 500/500 0/0 6.0/4 55/10

Clear a call

IAD2431#show voice call status
CallID CID ccVdb Port Slot/DSP:Ch Called # Codec MLPP Dial-peers
0xE7 131E 0x672BF20C 2/0 0/1:1 2000 g711alaw 2000/9000
1 active call found

IAD2431#clear call voice causecode 2 id 131E