This is a weird one.
Network:
Asterisk ver 1-0-9 on DL360.
10 Cisco 7960g phones with 3.8.2 SIP Load.
Gateway - Cisco 2811 router with 4 x verizon bri's.
Network - Private vlan with 1ms response times to all
devices.
Issue:
Intermittent echo on outbound/inbound calls. Users
hearing their own voice about 0.5sec later.
Tried so far:
Upgraded firmware on some phones to 3.8.2
Upgraded software on Cisco router.
Changed gain and attentuation settings on cisco router
Got Verizon to test bris
Moved rtp from asterisk direct to phone and router
(canreinvite=yes)
load tested asterisk
None of the above made any difference.
They are hearing their own voice so that means the
issue is on the far end. But should it be up to me to
control the possible delay or slippage in the verizon
bri network?
Any help much appreciated.
Taf.
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