No DUPLEX

When I place or receive calls, my phone seems to be in Simplex, or at most in half-duplex mode.

What can I do to make this problem go away?

Thanks,

Pasquale

Details please...

Hey Pasquale,

What kind of phone do you have, a SIP phone, a PSTN phone attached to an ATA?

By Simplex and Half Duplex, do you mean one-way voice?

Is the SIP UA (ATA, SIP phone) behind a firewall?

Thank you for your prompt answer. I have a pap2 behind a firewall.

For non-duplex I meant exactly what you stated: the call is basically one-way, only one person at the time can talk otherwise one does not know if the other is saying something...

In particular I use callcentric for my main home line. Since my first posting I have tried to change some setting to my pbsex account by enabling "audio bypass" to that trunk with a slight improvement, but not a full duplex conversation.

Thanks,

Pasquale

This post has been edited 1 time(s), it was last edited by pas on 24.06.2007 at 17:40.

The easiest way to test these issues is to eliminate the trunk from the equation.

Setup another extension on another ATA, at a friend's house or office, and verify if the issues persist. Tools to resolve these issues are, using a STUN server, passing the RTP packets via the SIP proxy by turning Audio By-pass Off, and opening ports on your firewall.

What kind of firewall do you have?

Unfortunately I have tried all of your suggestions several times. The problem must be PBXES.

Problems with your service got worse since I activated a 729 codec and now I have long delays in both making and receiving calls, and other problems with the PBXES (including callthru) but not with the individual trunks set-up alone. I can no longer use the fax and the callback features.

I had to remove my callcentric home line from PBXES and now callcentric works well. Luckily I have 2 lines on my PAP2 and use one for PBXES and the other for my callcentric line...

I hope to be able to use PBXES as my main line in the future, but I am having way too many problems to use it as my primary service for now.

I will be testing the service hoping in improvements because the service is very promising and would like to use it as my only phone system.

Thanks,
Pasquale

RE: No DUPLEX

Pasquale, we need some more details please:

• Is the call really one-way (A) or do you get audio in both directions, but not at the same time (B). Reason for A could be a router or firewall problem, B would look like a problem with the terminal.
  
• What about internal calls?
  

The firewall is just the router one and its settings are as they were for over 6 months now. I have been running PBXES with the current settings for months, the only other thing was to check the pap2.

So, after reading posts of firmwares on paps2, I decided to downgraded my pap2 to a previous, more stable version of its firmware (3.1.22(LS) ) and things are better.

1) The calls were not fully duplex, what I mean is that if the other person says something it will not be audible on my side as I speak. I do get audio in both directions, but not at the same time.

2) Internal calls work much better, in general with no noticeable difference.

Again, things are better. I will run more test calls with the new firmware and keep you posted.

Thanks,

Pasquale

This post has been edited 1 time(s), it was last edited by pas on 27.06.2007 at 00:30.