BCM 450 R6.0

[tjl052628]

I have 3 BCM 450 R6.0 and 2 BCM 50 R6.0 networked togather VOIP phones I have Echo problems the first 4 sec of the call all the settings are right and the codac are the same, All the settings on all the BCM are the same. Some of the Echo cleared up but still have 4 sec of Echo at the first of the call. HELP Please any one, any ideas

 

[phoneguy610]

need more info

echo usually is a network issue

vlans?

 

[tjl052628]

Yes sir haven't see one yet without echo. I have went over the QOS with the network IT guy as Avaya requested in the doc. We are running one flat vlan with no roputer, static assigned IP address to all the BCM and voip phones. around 175 to 200 phones. codac is set G711 and G729 both set at 20 ms, TRO, TAD are on all the bcm. I have tryed turning on the QOS on the voip phones did not make a diffrence. I am just trying to get it to work as good as possable for the cust. I did look at 2 of the cust switches they are Dell Power connect 3548P not sure what the other schools are useing probley the same with this being a school just looking for any ideas that might help this cust. Been working with our Atac people making call and running wire shark when making calls. The echo is not allways there on all the calls. I went to Jr high made calls sound good then went to Technology bldg and sound good then echo started back. Maybe when the network starts getting loaded up the echo starts? Fiber between all schools. Thank you for any ideas you might have, at this point I would try anything that might make a inprovement. Thanks again

 

[phoneguy610]

probably going to be a bandwith deal. Dell switches arent bad but you might want to look into purchasing some good managed switches and properly set up the vlans for voice.