BCM450 echo

[lcs226]

Hello all

Just installed a new BCM 450 R5 at Site A. Site B has a BCM 50 R2 that is networked to Site A via VOIP trunks and VPN.

Customer has all incomming callls to Site B (BCM50) reidrected to Site A (BCM 450) to be answered by a single attendant. The call can then be re-routed back to Site A if needed.

We are now getting complaints of an echo on sets that answer the call at site A (BCM 450) that were redirected from Site B. This only happens on incomming calls, all internal calls are clean and clear. Also, seems to be more of an issue on one of the incomming lines then the other 4. My thought is a provider issue but not sure.

Any thoughts please.

Thanks.

 

[gwebster]

Are the VoIP trunks IP end-to-end (i.e. IP out of the BCM all the way to the other BCM) or through gateways (Cisco,... which convert from TDM<->IP)? If the latter, you have a whole bunch of TDM<->IP conversions going on. Each of those adds delay plus can add echo due to signal reflection.

 

[lcs226]

BCM50 end is a Cisco 1811 router, not sure of the other end yaet. Will be there tomorrow to find out.

 

[bluemr2]

Problem is the lines are probably analog at the bcm50 site correct? Analog lines diverted across VOIP trunks notoriously cause echo.

 

[lcs226]

bluemr2, you are correct. Incomming are analog lines. Any ideas on how to correct this situation.

 

[lcs226]

Update

BCM450 end has a Cisco series 800 modem for DSL then to HP Switches