[Asterisk-Users] Polycom 600 problem

[Andrei (MPI)]

Hi Jared,

Thank you for your reply. That server is for asterisk only, things like 
X-windows and samba were not even installed there. I limited what I 
could from system point of view. Digium support has qualified the box as 
"clean" for TDM400P operations.

It is not clicks and pops, it's just brief moments of silence when I 
cannot hear the other side, while they can hear me okay. I will play 
more with configs and ideas you guys suggested.

Also it is really strange, that the problem always appears for a specfic 
phone. 9 phones are ALWAYS working just fine, while 1 phone is doing 
this interruptions for all outgoing calls, 2 more phones are having this 
problem from time to time. All the phones are same model and are 
configured in the same way, difference is only in extensions, voicemail 
box and user/passwords settings.

Echo cancellation? ulaw/alaw? Anything else? Thanks for your ideas.

Andrei


Jared Armstrong wrote:

>Andrei,
>
>Do you have X-Windows running on the linux box? I had a similar issue
>that was eliminated when I stopped this process and samba from running.
>Now samba is only allowed to come up during non-business hours, for
>changing BG music.
>
>Also, make sure your registration period in either (polycom) ipmd.cfg or
>sip.cfg is set to be at least the default 3600 time period. I also
>removed the qualify=2000 from my (asterisk) sip.conf file and now have
>less clicks/pops. What it sounds like to me is possibly that you are
>noticing a pop/click when asterisk as trying to re-qualify the phone
>during the middle of a call. Also do you have Busydetect enabled? I had
>to disable that setting in my Zapata.conf.
>
>Jared Armstrong
>
>-----Original Message-----
>From: Andrei (MPI) [mailto:asterisk at markovprocesses.com] 
>Sent: Wednesday, December 22, 2004 7:09 PM
>To: Asterisk Users Mailing List - Non-Commercial Discussion
>Subject: [Asterisk-Users] Polycom 600 problem
>
>Hi there,
>
>We are using 10+ Polycom SP IP 600 phones with Asterisk and TMD400P with
>
>4 FXO lines.
>
>So far we have 3 phones with following problem: more or less frequently,
>
>for every call or ever other call, user of the phone would hear brief 
>interruptions on the line when dialing out via PSTN, like if someone 
>would be disconnecting and reconnecting the external line a few times 
>per second. At the same time Asterisk Voicemail, Music on hold, SIP to 
>SIP calls would work just perfect. Loud and clear.
>
>It is not dependant on network conditions, network configuration, 
>extension number, PSTN phone # dialed or particular network location of 
>the phone. So it is a problem with the phone. I've tested this quite 
>thoroughly: if I install a different 600 phone - that one would work 
>just fine at the same locations/extension/network connection etc. Cisco 
>7940 does not have this problem either.
>
>I already RMA-ed one of the Polycoms and looking to return the other 2. 
>Meanwhile, if someone can comment on this problem, that would be a great
>
>help!
>
>Other than this problem, the Polycoms 600 are excellent for Asterisk
>setup.
>
>Thank you,
>Andrei
>
>
>
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