asterisk users - Jan 2004 - Incoming DID call Voice Problems

Hello All,

I am experiencing some intermittent problems with calls coming inbound on my DID
trunk.  I have 12 DIDs that come into an Adtran 750. From there T-1 to a port on
T400P.  The problem is that some calls that come in don't seem to bridge
properly.

Heres what happens.

Call comes in on Trunk.
Call Routed to correct Zap Channel.
Phone Rings.
Person Answers phone, but hears nothing but their own echo.
Calling party hears everything fine.

I have MARK2 enabled in Zaptel driver for echo problems on my PRI line.


I can't seem to replicate the problem calling out PRI to the DIDs, or from a
cell phone.


I can reliably replicate the problem with an offsite customer that calls in.


Any idea what may be causing this?

Thanks in advance.

I have an updated question on this one.  It seems that only inbound long
distance calls (calls from outside the local calling area) on our DID trunk have
one-way voice.   I have my adtran 750 fxs lines configured as FXS Loopstart with
all the defaults.  Again, the problem is that once the call bridges, the outside
caller can hear the person they called, but the inside person can't hear the
caller.  This happens regardless of the internal technology, SIP, Zap, H323.

Could it be possible that inbound long distance calls are signalled different
than inbound local calls?  Inbound calls on the PRI work flawlessly.

Any ideas

-sb



-----Original Message-----
From: asterisk-users-admin@lists.digium.com
[mailto:asterisk-users-admin@lists.digium.com]On Behalf Of Bisker, Scott
(7805)
Sent: Saturday, January 24, 2004 3:18 PM
To: asterisk-users@lists.digium.com
Subject: [Asterisk-Users] Incoming DID call Voice Problems


Hello All,

I am experiencing some intermittent problems with calls coming inbound on my DID
trunk.  I have 12 DIDs that come into an Adtran 750. From there T-1 to a port on
T400P.  The problem is that some calls that come in don't seem to bridge
properly.

Heres what happens.

Call comes in on Trunk.
Call Routed to correct Zap Channel.
Phone Rings.
Person Answers phone, but hears nothing but their own echo.
Calling party hears everything fine.

I have MARK2 enabled in Zaptel driver for echo problems on my PRI line.


I can't seem to replicate the problem calling out PRI to the DIDs, or from a
cell phone.


I can reliably replicate the problem with an offsite customer that calls in.


Any idea what may be causing this?

Thanks in advance.



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