[cisco-voip] One Way RTP voice problems using CME

[Kristján Ólafur Eðvarðsson]

You see the PIX was there before I change the CME and it worked great.
It has Sysopt connection permit ipsec configured so it allows anything within the IPsec tunnel.
I included the CME public address to the tunnel if the right networks are the source.

So my focus is still on the CME. What is happening that might be causing this.
I can wake the tunnel straight from the CME and ping and telnet on port 80 to the remote phones from the CME telnet console.

regards. Kristjan 

-----Original Message-----
From: Voll, Scott [mailto:Scott.Voll at wesd.org] 
Sent: 23. maí 2005 21:49
To: Kristján Ólafur Eðvarðsson; cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] One Way RTP voice problems using CME

Sounds like a pix problem. Are you allowing traffic back?



-----Original Message-----
From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Kristján Ólafur Eðvarðsson
Sent: Monday, May 23, 2005 2:33 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] One Way RTP voice problems using CME

Hi all,

I have this One Way Voice issue with CME through PSTN PRI. This happened after I started connecting Internet straight to the CME instead of letting another router do it.

Past:
I have been using Cisco 2811 and CME for some time. The CME registers other remote IP phones over ipsec tunnel terminated at a same network router. Those far end phones use the PSTN on my site with success.

Present:
However when I set up a Internet connection straight to my CME (using G.SDHSL VIC, skiping the older Internet Router that used to terminate the VPN) and a Ipsec tunnel to the same destination as before (Cisco PIX) I have these facts:

1. IP phones locally and on the far end can comunicate with out problems as before.
2. Far end IP phones can be called via the PSTN and they can call through pstn but always we have one-way voice problem. Far end hears nothing but PSTN hears them  (other call controll seems to work, like ringback, remote phone is ringing etc.) 3. I tried to include the CME Internet IP address to the tunnel, so it would be included when the router itself was orginating packets but that didn´t change anything.

Anyone had this issue or have faced this particular problem ?

For clarification, the schenario is like this:

PSTN----Local IP phones---CME<------------------<WAN/Internet>------------>PIX-----remote IP phones<registerd to the CME 

regards. Kristjan Edvardsson
CCNP - MCSE
Sensa ehf. Cisco Silver Partner

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