01-19-2009 07:26 AM - edited 03-15-2019 03:36 PM
The setup is an 1861 with 5 IP phones. I am running version 12.4(22)T The receptionist is saying that when some calls come in from outside customers, she intermittently has a delay of 10 seconds before she can hear the caller's voice. What would cause this to happen? The config of the 1861 is attached. Thanks
01-19-2009 07:42 AM
What's the call flow?
Something like:
7965--Fa0/1/0--1861---FXS---PSTN
Or
7965--Fa0/1/0--1861--Fa0/0--H323--CUCM--MGCP--GW--PRI--PSTN
01-19-2009 07:57 AM
It should be like this:
7965--Fa0/1/0--1861--Fa0/0--H323--CUCM--MGCP--GW--PRI--PSTN
The Call Manager is located in my office. It is version 6.1.1.2000-3.
01-19-2009 08:08 AM
On CUCM, you can try two things:
On the H323 gateway:
Check MTP required
Enable Outbound Fast Start
and
Enable Inbound Fast Start
Sometimes we see long delays with H323 is required to do slow start.
Otherwise, it would require getting mgcp/pri debugs from the far end gateway, CCM traces, and H323/ccapi debugs from the 1861 - which is messy.
hth,
nick
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