One way audio

[CommoGuy101]

Morning all,
I am having an issue with one way audio from our CS1000E.
Below is a trace of a call that fails periodically.
Not sure if I am having a Gateway problem, signal server problem, or a network issue.
Is there a way that I can narrow down where the call is failing?

.trac 0 47704

ACTIVE TN 016 1 06 01 IPMG 016 1

ORIG TN 016 1 06 01 IPMG 016 1 KEY 0 SCR MARP CUST 0 DN 47704 TYPE 3904
VGW TN 016 1 00 15
SIGNALLING ENCRYPTION: INSEC
FAR-END H.323 SIGNALLING IP: 192.168.70.30
FAR-END MEDIA ENDPOINT IP: 192.168.95.57 PORT: 5230
FAR-END VendorID: Not available
TERM VTN 252 0 07 24 IPTI RMBR 75 249 OUTGOING VOIP GW CALL
FAR-END H.323 SIGNALLING IP: 192.168.240.20
FAR-END MEDIA ENDPOINT IP: 192.168.240.25 PORT: 5226
FAR-END VendorID: Nortel_CSE_1000;ssLinux-6.00.18
MEDIA PROFILE: CODEC G.711 MU-LAW PAYLOAD 20 ms VAD OFF
DIAL DN 913304561212
MAIN_PM ESTD
TALKSLOT ORIG 80 TERM 48 JUNCTOR ORIG0 TERM0
EES_DATA:
NONE
QUEU NONE
CALL ID 0 27178


---- ISDN ISL CALL (TERM) ----
CALL REF # = 633
BEARER CAP = VOICE
HLC =
CALL STATE = 10 ACTIVE
CALLING NO = 3303447704 NUM_PLAN:E164 TON:NATIONAL ESN:NPA
CALLED NO = 13304561212 NUM_PLAN:E164 TON:NATIONAL ESN:NPA

Thank you in advance,
Commoguy101

 

[Wanebo]

In my experience one way audio is usually nailed down to a codec mismatch between the devices. Since the far end is a CS1K also can you get a TRAC on the other device and see what codec it is trying to use on a bad call?

 

[CommoGuy101]

Wanebo,
Not sure how to get that trace.
Looks like the calls are made from the 1000E and then routes over H323 trunks to the 1000M and then out.
Not too sure how to gather the information (trace) of the call leaving the 1000M.
Can you lead me in the right direction?

Thank you,
CommoGuy101

 

[kstaff22]

The 1st thing I would try to do is narrow it down---is it only when I dial thru the 1000M or can I duplicate it by just dialing the 1000M.

 

[CommoGuy101]

As far as I can tell...
It appears to be when a call is generated from the 1000E then routes to the 1000M via h323.
At that point calls grab a PRI channel to complete the outside call.
So sometimes the callers only get 1 way audio.
Other times the call is dropped.
At sometimes the call is completed without any issues.

Basically couldn't duplicate the issue from dialing directly to the 1000M from the 1000E.
Appears to be only on calls that external.

Hope that helps.
Anything I can provide for more help, please let me know.

CommoGuy101

 

[CommoGuy101]

I have also noticed that within the RDB I see that the DSEL is set to VOD...I know that there are other options such as VCE or #VCE
Would the setting of VOD cause 1 way audio?
Could 3VCE correct the issue?

CommoGuy101

 

[KCFLHRC]

I have seen one way audio with Media Cards and MGC Cards in the mix. You are just going to have to narrow down where exactly it is failing.

 

[AvayaHE]

What Release on 1000M runs ?

 

[phones1]

sounds like a dodgy dsp somewhere

Remember if it doesn't work hit it harder

Scott UK