[cisco-voip] SUCCESS!! Re: Phones Ring but no voice? CME- to other Router

Mon Jun 22 03:38:35 EDT 2009

Hi Guys,

I finally got this working,

I can now ring between IP phones on each router and ring between the IP
phones and the pots phones...

I can dial out on the PSTN and dial in with a PLAR from the PSTN...

in the end, it was 

"ip routing"

that needed to be set on one of the routers, I had thought that since I
could ping end to end and that they were on the same subnet that there
would be no routing issues. But it seems this needs to be in place
regardless.

i found this after finding the cisco "one way / no way" voice wiki?

http://docwiki.cisco.com/wiki/Cisco_Unified_Communications_--_One-Way_Audio

Which helped me

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/ 

>>> Tim Smith <thsglobal at gmail.com> 19/06/2009 03:22 >>>
Hi Robin,
Do you have the H323 bound to a specific loopback or interface? 
I wouldnt change to E&M just yet. Your FXO should work. I think you
have an underlying problem that will go across both POTS technologies.
I'd post your configs. Without these, we cant say whether it is
configured correctly and not working, or whether it is missing config
hence not working.
Cheers,
Tim

On Thu, Jun 18, 2009 at 5:31 PM, Robin Clayton
<Robin.Clayton at rrca.org.uk> wrote:

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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