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Can make calls, but cannot hear receiving voice


Ryan
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I have a Grandstream HandyTone-486.

 

I can make calls out to normal phones (e.g. a cell phone), but I can't hear anything.

The person on the cell phone receiving my call can hear me fine, but I can't hear them.

I have setup the phone fine accoring to our network, any ideas what this problem could be?

 

Thanks in advance,

 

Ryan

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You registered the Grandstream as extension?

 

I would check what codec it is using, routing and connectivity between pbx and Grandstream, maybe a firewall inbetween, STUN settings...

 

I had something similar with audio in only one direction (not with a Grandstream) and it was because of the low bandwidth codec g.729 (18) which has to be purchased separately in pbxnsip.

 

Detlef

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Thanks for your reply, Detlef.

 

I have checked most of that stuff out and to no avail. It seems to be a pbxnsip issue as we've had this issue before.

Not sure why it is but I'm going to also post in the main.

 

Ryan

 

 

You registered the Grandstream as extension?

 

I would check what codec it is using, routing and connectivity between pbx and Grandstream, maybe a firewall inbetween, STUN settings...

 

I had something similar with audio in only one direction (not with a Grandstream) and it was because of the low bandwidth codec g.729 (18) which has to be purchased separately in pbxnsip.

 

Detlef

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  • 3 weeks later...
Thanks for your reply, Detlef.

 

I have checked most of that stuff out and to no avail. It seems to be a pbxnsip issue as we've had this issue before.

Not sure why it is but I'm going to also post in the main.

 

Ryan

 

 

Make sure you use G.711u on all codec choice and do not use STUN or any nat traversal feature. What is the version of pbxnsip?

 

Digisoft VOIP

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On the phone I was testing with, it was a Grandstream BT100, rev. 02. I had the same problem with another cheaper grandstream setup as well.

I don't have the option of using the G.711 codec on this phone.

 

The default codec, which we are using, is G.722 (wide band). Other options are

G.723.1, G.729A/B, PCMU, PCMA, iLBC, and G.726-32.

 

Any other ideas? I appreciate the help.

 

Ryan

 

Make sure you use G.711u on all codec choice and do not use STUN or any nat traversal feature. What is the version of pbxnsip?

 

Digisoft VOIP

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  • 4 months later...

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