[Asterisk-Users] Re: Polycom IP 600 - 1.3.1

[Noah Miller]

Hi Chris -

>I am getting to my wits end with these phones (and so is my boss).  I am
>getting an random echo on these phones and I have an issue opened with
>Polycom and its been in their research and development department for
>almost a month with no results. 
>  
>
I'm amazed it got that far with Polycom.  My experience is that they do 
not support these phones at all.

>I have noticed that I get a message "RFC3389 support incomplete.  Turn
>off on client if possible" in asterisk. I have researched this and made
>the change in ipmid.cfg (see below), but I am still getting this RFC
>error.
>
>--- ipmid.cfg ----
><RTP qos.ethernet.rtp.user_priority="5"/>
>                        <RTP qos.ip.rtp.min_delay="0"
>qos.ip.rtp.max_throughput="0" qos.ip.rtp.max_reliability="0"
>qos.ip.rtp.min_cost="0" qos.ip.rtp.precedence="0"/>
>                        <RTP tcpIpApp.port.rtp.filterByIp="1"
>tcpIpApp.port.rtp.filterByPort="0" tcpIpApp.port.rtp.forceSend=""
>tcpIpApp.port.rtp.mediaPortRangeStart=""/>
>----- end ----
>
>I am just wondering if anyone can help me troubleshoot the echo and RFC
>error so I don't have to pull the entire phone system out and purchase
>an entire new system.  
>  
>
What version of * are you using?  I'm using 1.0.2 with Polycom 1.3.4 
firmware on IP600's and I haven't seen any of these problems.  If you'd 
like the 1.3.4 version of the firmware, just let me know off list.

Stupid Question:  Is the echo on all calls or just on calls to/from the 
PSTN?  If just PSTN calls, do you have any echo cancellation enabled?

Thanks,
Noah