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Joined: Sep 2004
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Former Moderator-Toshiba, Request an Installer
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Former Moderator-Toshiba, Request an Installer
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Display works great, calls to and from main office are good, but no audio on remote IPT's. I am on my way to remote site now. Any ideas?
I think these are the same phones that have been in service for the last 2 years
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Joined: Jul 2006
Posts: 728
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Joined: Jul 2006
Posts: 728 |
A change to the RTP ports on the network?
Turn Diffserv off and see if that helps. Depending on how many hops it takes for the IP phone to connect back to the phone system, one or more hops may not be configured for Diffserv causing a drop in Voice. I know it sounds like a stretch but I've had this happen.
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Joined: Mar 2005
Posts: 183
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Joined: Mar 2005
Posts: 183 |
Has the ISP change settings and your LIPU card is now going through NAT
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Joined: Jul 2006
Posts: 728
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Joined: Jul 2006
Posts: 728 |
Voyager and I talked about this on the phone. Seems IP calls internally work fine. It is when the IP phone call thru the PRI or get a call thru the PRI that their is no audio. I used to have a fix to this on a document but can't seem to find it for the life of me.
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Joined: Dec 2007
Posts: 2,033
Moderator-Toshiba
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Moderator-Toshiba
Joined: Dec 2007
Posts: 2,033 |
I'd question the same as petersog : has NAT been introduced?
or for that matter... anything different about the IP/Network setup at all?
- Tony Ohio Data LLC Phone systems, data networks, firewalls and servers in Central Ohio. Some people aren't used to an environment where excellence is expected.
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Joined: Jan 2008
Posts: 59
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Joined: Jan 2008
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Have you checked the timing source on the pri ? i have found before that if the timing source isnt set or locked up then rtp wont work.
Live Long and Prosper My Friends
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Joined: Sep 2004
Posts: 2,017
Former Moderator-Toshiba, Request an Installer
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Former Moderator-Toshiba, Request an Installer
Joined: Sep 2004
Posts: 2,017 |
Update - Thanks for all the responses. The customer took the IP phone home, plugged it in and it worked just fine. This tells me that the problem is in the router at the model home office. The "IT Guy" is going to look at it tomorrow and let me know what he finds.
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Joined: Sep 2004
Posts: 2,017
Former Moderator-Toshiba, Request an Installer
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Former Moderator-Toshiba, Request an Installer
Joined: Sep 2004
Posts: 2,017 |
Resolution .....
IT guy went in and replaced the firewall with one that supports VOIP traffic and the problem is solved.
Thanks for all the responses
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Joined: Dec 2007
Posts: 2,033
Moderator-Toshiba
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Moderator-Toshiba
Joined: Dec 2007
Posts: 2,033 |
Gotta love that!
Thanks for the follow up.
- Tony Ohio Data LLC Phone systems, data networks, firewalls and servers in Central Ohio. Some people aren't used to an environment where excellence is expected.
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