[Asterisk-Users] Incoming DID call Voice Problems

[Michael Welter]

And check the firmware revision in your Adtran.  I believe current is L36.

Alfred R. Nurnberger wrote:

> 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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