IP Phone 2004 - echo and bad static

[bcmtech]

Has anyone had a problem with the VoIP phones having echoes and problems hearing people. It is happening on both BCM 400 - 3.5 and 3.6

 

[acewarlock]

may be a QOS issue. not enoght bandwidth.

 

[Jephph]

We have intermittent issues with bcm 3.6 voice quality, with the primary complaint being "Darth Vader" effect. This is normally i2004 <--> i2004 on the same LAN with Baystack 460's fully VLAN'd, separating PC traffic from VOIP traffic. Does this match your symptoms?

 

[biv343]

There is a patch available that addresses echo on phase 2 IP sets, but I don't believe that phase 2 sets are supported on 3.5 - only 3.6 with a firmware patch.

Typically networks/LAN won't cause or induce echo, unless there is a high variance in jitter during the duration of the call. My experience has been that echo on IP sets is typically caused by "hot" trunks. In the case of T1/PRI, you can increase the CSU buildout to pad down the signal levels.

Does the echo happen from IP set to IP set, over IP trunks, PSTN trunks (analog or digital)?

 

[bcmtech]

The problem I am having is mostly on Calls from the PSTN. All internal calls sound fine. I have the patch loaded on the 3.6 and still experiencing the problem.

 

[biv343]

Are the PSTN trunks analog CO trunks or is it a T1/PRI?

 

[bcmtech]

Just FYI - I loaded all the avaiable patches for 3.6 and it cleared the problem. I guess my solution on the other 2 is to upgrade to 3.6 and load all the patches