[Asterisk-Users] Incoming DID call Voice Problems

[Alfred R. Nurnberger]

The only thing I can think of in respect to analog DID lines is answer
supervision.
DID lines provide one way - outbound audio - before answer and cut through
bidirectional audio only after answer. But this could happen also outside
the local switch so local calls will still have bidirectional audio. Since
only the outside caller gets audio, I could imagine that either answer
supervision is not given properly or maybe the Wink pulse is not recognized.
Something in this vicinity ...

See if you can get proper audio if you replace the outside DID line with a
regular phone.
Check for proper polarity reversal (wink pulse after seizing the line) and
constant reversal after answer.
Make sure that Ring/Tip is not reversed. DID lines need proper polarity to
work correctly.

Regards.
Alfred R. Nurnberger
  _____

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-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Bisker, Scott
(7805)
Sent: Monday, January 26, 2004 6:32 AM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] Incoming DID call Voice Problems


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 at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Bisker, Scott
(7805)
Sent: Saturday, January 24, 2004 3:18 PM
To: asterisk-users at 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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