[cisco-voip] Phones Ring but no voice? CME- to other Router

[Robin Clayton]

Hi Guys 
 
I did some more testing last night,
 
I did the 
 
debug voip cappi inout
 
there' was stuff logged on both routers but it did not make a whole
heap of sense to me ( Noob!!! )
 
I did some other testing,
 
I set up CME on the other router, so it's now one router with IP & FXO 
and the other router with just IP.
 
As before I can call 
IP <-> FXO on the same router works fine 
IP <-> FXO on different routers ends up with no voice
IP <-> IP on different routers ends up with no voice
 
If I force the codecs to be wrong then I don't even get a ring on the
destination phone.
 
Furthermore, I checked the status of the calls "call stats" on the 7940
and it shows 
 
RxType G711a
TxType G711a
 
on both phones.
 
But what is most interesting, is that 
 
RxCnt ( Recived packet Count ) never moves of Zero
TxCnt ( Transmited packet Count ) increments as time passes during the
call.
 
 
So, packets are going but not getting where they are supposed to by the
looks of things, which is a little odd as they are on the same subnet.
And the SCCP packets must be going the right way as the phones ring.
 
 
 
I am going to try an E&M connection between the two routers tonight and
see if that works at all.... 
 
 
Cheers
 
Rob
 
 
 
 
 
===============================
Robin Clayton
Network Manager 
Tel: 01228822075 
 


Richard Rose Central Academy 
Edgehill Road 
Carlisle 
Cumbria 
CA1 3SL 

Tel: 01228 822060 
Fax: 01228 822061 

http://www.richardroseacademies.org/ 

>>> Barış Gülten <barisgulten at gmail.com> 18/06/2009 00:06 >>>

 
I think, maby be two reason about this issue.
1-      Ip connectivity problem. Be sure ping each other.
2-      Codec problem, select same codec each one.
 

From:cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Robin
Clayton
Sent: Monday, June 15, 2009 3:12 PM
To: cisco-voip at puck.nether.net 
Subject: Re: [cisco-voip] Phones Ring but no voice? CME- to other
Router

 

Hi Paul

 

I have so far only done 

 

show call active voice

 

which confirmed that calls were being created and torn down. 

 

I have tried a 2600 but that was really unstable and rebooted on
connection of the call!!!

 

I have downloaded some debugging documents from cisco that I will have
a scan through.

 

Cheers

 

Rob

 

 

 

 

 

 

 



Richard Rose Central Academy 
Edgehill Road 
Carlisle 
Cumbria 
CA1 3SL 

Tel: 01228 822060 
Fax: 01228 822061 

http://www.richardroseacademies.org/

>>> Paul <asobihoudai at yahoo.com> 15/06/2009 12:59 >>>

What troubleshooting steps have you taken thus far?

Have you used 'debug voip ccapi inout'?




________________________________
From: Robin Clayton <Robin.Clayton at rrca.org.uk>
To: cisco-voip at puck.nether.net 
Sent: Monday, June 15, 2009 7:36:44 AM
Subject: [cisco-voip] Phones Ring but no voice? CME- to other Router


Test Lab Setup is.

1760 with CME4 and 2 7940's

Conected via ethernet to

2651 with 2 POTS on FXO's


Call from 7940 to 7940 work fine
Call from POTS to POTS work fine

Previously with FXO in the 1760, 7940 to POTS worked fine.

Now when I try to place a call between the CME router and the other
router or vice versa, the phones ring as expected but then there is no
voice between the phones. 

Has anyone got any ideas as I am realy scratching my head on this now
and getting frustrated.

Thanks

Robin

===============================
Robin Clayton
Network Manager 
Tel: 01228822075 

  

Richard Rose Central Academy 
Edgehill Road 
Carlisle 
Cumbria 
CA1 3SL 

Tel: 01228 822060 
Fax: 01228 822061 

http://www.richardroseacademies.org/ 


      


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