[cisco-voip] Nortel phones on Cisco Swtich

[Wes Sisk]

Static is sometimes QoS related, but it can also be directly in the 
audio stream which QoS will not help.

Start with a packet capture.  wireshark will extract audio and output 
and audio file.  if you hear static in the audio file then the static is 
inserted upstream and QoS will not help.

if you do not hear static in the audio file then very likely it is QoS 
related.  wireshark will generate throughput and RTP analysis to look 
for jitter and out of order packets. if you see those, then you do 
indeed need QoS.

QoS for voice is a very long topic, I recommend starting at 
http://www.cisco.com/go/srnd

Regards,
Wes

On Thursday, February 12, 2009 10:48:25 AM, Morgan Andreas 
<morgan.andreas at gmail.com> wrote:
> I have a Nortel BCM200 phone system w/ I2002 & I2004 phones. We are 
> needing to configure QOS on the 3560Gs they have in place for their 
> Nortel phones. They are currently complaining of static on all the 
> phone lines including their intercom system (thru the Nortel phone 
> system). We have them Vlan'd out (voice/data) but not sure of the 
> commands to enable the QOS on switch for the phones. Does anyone 
> happen to have any incite as to what needs to be done in order to 
> enable the QOS for these phones? Any help would be appreciated.
>
> Thanks
> ------------------------------------------------------------------------
>
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