# Asterisk 14 : one way audio **URL:** \ **Category:** Asterisk SIP\ **Created:** [December 24, 2016, 12:18pm UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175 "2016-12-24T12:18:20Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![avani](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/avani/32/2005_2.png) [@avani](https://community.asterisk.org/u/avani)\ **Post date:** [December 24, 2016, 12:18pm UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175/1 "2016-12-24T12:18:20Z")
I have currently installed asterisk 14.2.1. I have one way audio for every codec . I have no NAT in sip.conf setting. can any one suggest me what should be the correct procedure to resolve it ? ---
**Author:** ![malcolmd](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/malcolmd/32/5_2.png) [@malcolmd](https://community.asterisk.org/u/malcolmd)\ **Post date:** [December 24, 2016, 1:33pm UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175/2 "2016-12-24T13:33:01Z")
Post some information about your network topology, with respect to the endpoint, along with your SIP settings, along with a capture of the SIP signaling showing the call setup. ---
**Author:** ![ambiorixg12](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/ambiorixg12/32/1887_2.png) [@ambiorixg12](https://community.asterisk.org/u/ambiorixg12)\ **Post date:** [December 24, 2016, 10:35pm UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175/3 "2016-12-24T22:35:32Z")
On the sip.conf sample file there is a section called ;------------------ NAT SUPPORT ---------- give a read and you will have a better idea of what to change on your configuration file [http://svn.digium.com/svn/asterisk/trunk/configs/samples/sip.conf.sample](http://svn.digium.com/svn/asterisk/trunk/configs/samples/sip.conf.sample) ---
**Author:** ![ivan\_stepanov](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/ivan_stepanov/32/2610_2.png) [@ivan\_stepanov](https://community.asterisk.org/u/ivan_stepanov)\ **Post date:** [December 30, 2016, 6:26am UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175/4 "2016-12-30T06:26:46Z")
Try in the configuration file to register such parameter: nat=force\_rport,comedia ---
**Author:** ![david551](https://avatars.discourse-cdn.com/v4/letter/d/3bc359/32.png) [@david551](https://community.asterisk.org/u/david551)\ **Post date:** [December 30, 2016, 10:58am UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175/5 "2016-12-30T10:58:07Z")
The reference to the configuration file was mainly about the external addresses, not the nat= parameter. For most common configurations, the default nat= should work. In any case, the OP claims this is not a NAT case, in which case firewalls are the only real possibility. ---
**Author:** ![avani](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/avani/32/2005_2.png) [@avani](https://community.asterisk.org/u/avani)\ **Post date:** [January 5, 2017, 6:16am UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175/6 "2017-01-05T06:16:20Z")
Thank you very much everyone for reply.I will try suggested parameters and will ping if not work as per expectation. Regards. ---
**Author:** ![avani](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/avani/32/2005_2.png) [@avani](https://community.asterisk.org/u/avani)\ **Post date:** [March 6, 2017, 1:56pm UTC](https://community.asterisk.org/t/asterisk-14-one-way-audio/69175/7 "2017-03-06T13:56:27Z")
Sorry for late reply , actually I was working on different task.One way audio problem only occurs when it deals with “opus codec”. Another codecs which I use are ulaw , g722 etc. With those codecs call works correctly.Can anyone elaborate what actual problem with opus .As I mention earlier I am using asterisk 14 on ubuntu 14.04.