Unified Communications

We have an odd issue on CM 7.1 where we are getting reports of dead air on some calls where the called party has the EC500 feature enabled and the end user answers their desk phone and not their cell phone. There is dead air on the initial talk path, but if we have the callers press a touch tone/DTMF, the call talk path establishes... It also doesn't happen on every call, but we do seem to be able to duplicate it at some of our locations. Has anyone else run into this after upgrading to CM 7.1? We attempted to turn on "Direct IP Audio" on all of the related signalling groups, but that didn't seem to help. Any feedback or suggestions would be much appreciated.

Adam

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Adam Schuyler
Telecom Engineer
Science Applications International Corporation

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Are these SIP calls or TDM calls?

If SIP, what SBC are you using?

 

This happened at one of my sites intermittently (like yours) with SIP calls. It turned out to be a bad border element (SBC) on the carrier's side. Once they directed my calls to a new border element, it alleviated one-way audio. EC500 had nothing to do with the issue I had.

 

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Ted Hargiss
Manager
Landstar System, Inc.
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Original Message:
Sent: 10-09-2018 09:19 PM
From: Adam Schuyler
Subject: Dead Air on CM 7.1 with EC500

We have an odd issue on CM 7.1 where we are getting reports of dead air on some calls where the called party has the EC500 feature enabled and the end user answers their desk phone and not their cell phone. There is dead air on the initial talk path, but if we have the callers press a touch tone/DTMF, the call talk path establishes... It also doesn't happen on every call, but we do seem to be able to duplicate it at some of our locations. Has anyone else run into this after upgrading to CM 7.1? We attempted to turn on "Direct IP Audio" on all of the related signalling groups, but that didn't seem to help. Any feedback or suggestions would be much appreciated.

Adam

------------------------------
Adam Schuyler
Telecom Engineer
Science Applications International Corporation

------------------------------

Original Message------

Are these SIP calls or TDM calls?

If SIP, what SBC are you using?

 

This happened at one of my sites intermittently (like yours) with SIP calls. It turned out to be a bad border element (SBC) on the carrier's side. Once they directed my calls to a new border element, it alleviated one-way audio. EC500 had nothing to do with the issue I had.

 

------------------------------
Ted Hargiss
Manager
Landstar System, Inc.
------------------------------

Notify your carrier of the issue and have them evaluate their border elements.

------------------------------
Ted Hargiss
Manager
Landstar System, Inc.
------------------------------

Original Message:
Sent: 10-11-2018 08:16 AM
From: Adam Schuyler
Subject: Dead Air on CM 7.1 with EC500

SIP trunks

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Original Message------

Are these SIP calls or TDM calls?

If SIP, what SBC are you using?

 

This happened at one of my sites intermittently (like yours) with SIP calls. It turned out to be a bad border element (SBC) on the carrier's side. Once they directed my calls to a new border element, it alleviated one-way audio. EC500 had nothing to do with the issue I had.

 

------------------------------
Ted Hargiss
Manager
Landstar System, Inc.
------------------------------