[Users] one way audio problem (urgent)

unplug maillisting at gmail.com
Thu Apr 27 05:39:37 CEST 2006


I am troubleshooting the one way audio problem for almost a week but I
still find nothing to solve it.

I am using mediaproxy as a NAT proxy.  I have tried a IP phone with
NAT and one without NAT.  Below are the combination and the result.

call making from one party to another party
    party A                 party B
1) IP phone (NAT) <--> PSTN : no problem
2) IP phone (NAT) <--> IP phone (no NAT) : no problem
3) PSTN --> IP phone (no NAT) : no problem
4) IP phone (No NAT) --> PSTN : one way audio problem

In case 4, party A speaks but party B hears nothing (no noise & only
slient).  Party B speaks and party A can hear.

First of all, anyone can tell me whether it is the correct information
store in location for a non-NAT user.
first row is a NAT user	and the second row is a non NAT user (received field
is null)

| username     | domain | contact                               |
received                | expires             | q     | callid        
                  | cseq  | last_modified       | flags | user_agent  
                             | socket              |

| 871966629896 |        | sip:871966629896 at 10.0.0.78:5060       |
sip:210.184.23.31:5060  | 2006-04-26 17:28:43 | -1.00 |
ZpFfQWHzpzbJpyLU at 10.0.0.78       |  2501 | 2006-04-26 17:28:09 |     1
| KE10XX v4.32.10 00-09-45-0a-fc-7b | 203.193.26.234_5060 |
| 871966760539 |        | sip:871966760539 at 218.189.176.170:5060 | NULL
                   | 2006-04-26 17:29:08 | -1.00 |
ofFds00mZt1jWFFs at 218.189.176.170 |  2527 | 2006-04-26 17:28:09 |     0
| KE10XX v4.32.14 00-09-45-0a-fc-29 | 203.193.26.234_5060 |

Then, I have compared the log from ngrep but can't find anything
special to cause the problem.

Below is the log from ngrep for the case 4 that cause one way audio problem.
I have compared with other cases above in the section of SDP but nothing found.
http://fisher.no-ip.com/ngrep/nonat2pstn1.log

Below is the configuration of our system.

IP phone (NAT) --- openser --- CISCO --- PSTN --- phone
IP phone (no NAT)-----+

As the result shown above and only case 4 has problem.  Will the one
way audio caused by CISCO?

Anyone can help?



On 4/18/06, Daniel-Constantin Mierla <daniel at voice-system.ro> wrote:
> Hello,
>
> On 04/18/06 04:39, unplug wrote:
> > Hi,
> > Anyone has experienced an one way audio problem after a call is made?
> > Here is my case.
> > openser1.0.1 + mediarproxy 1.4.2
> > User behind NAT can make a call without problem.
> > When user with no NAT (direct connect to the internet), one way audio
> > will happen.  Anyone can suggest a way to trace the problem.
> >
> sniff the network and see if the SDP is SIP messages are right, maybe
> you misconfigured the proxy and try to do (improper) media relaying for
> not natted users.
>
> Cheers,
> Daniel
>
> > Thanks,
> > unplug
> >
> > _______________________________________________
> > Users mailing list
> > Users at openser.org
> > http://openser.org/cgi-bin/mailman/listinfo/users
> >
> >
>




More information about the Users mailing list