[Asterisk-Users] Re: Adtran 750 DID question.

[Kekin Dand]

I posted this below message few days ago, but some how it didn't show up in
the mailing list.

When some one calls into your DID Trunk line what symptom do you see on
Adtran as well as on Asterisks console? 

Asterisk winks properly in FXO DPO mode, we had checked this things with our
Telco instruments. If your PBX doesn't wink to Telco, your DID line's will
become busy, that is one way to check whether Asterisk is winking properly
or not.

What series FXS card you are using? Is it L1 or L2? Because only L1 series
cards work with our DID trunk line. I don't know why and still Adtran
technical support is not able to figure out. 

I have same configuration running in my office and finally with all the help
from Digium and adtran, problem seems to be less. 
Still fully it is not resolved yet because FXS L2 is not working. 

Hopefully Adtran will release new firmware. 

Regards,
Kekin


-----Original Message-----
From: Kekin Dand 
Sent: Tuesday, January 27, 2004 5:24 PM
To: asterisk-users at lists.digium.com
Subject: Re:Incoming DID call Voice Problems

I had similar problem and it took all most 2 months to resolve it.

Few things you have check in your Adtran 750 configuration. 
1. For incoming DID trunk line it has to terminated on FXS card. (Which I
think you already did)
2. FXS card needs to be set on FXS DPO mode in order to work properly.
3. Your DID trunk line should be configured in Asterisk as "em" in
zaptel.conf and e&m_w in Zapata.conf.

Reason you are facing this problem either your battery is not getting
reversed and Telco can't see Answer Supervision on your line when the calls
get connected. If you have ohms meter or multimeter check your DID line
voltages. When inbound call comes in and both parties go off hook you should
see positive voltage on that line, in idle situation(on hook) you will
negative 48V.

Yes, local calls are different then long distance. Answer Supervision is not
required for local calls. Only for long distance it is required, so that
Telco can start billing.

Hope this should resolve your problem. 


Regards,
Kekin



Subject: RE: [Asterisk-Users] Incoming DID call Voice Problems
Date: Mon, 26 Jan 2004 09:31:32 -0500
From: "Bisker, Scott (7805)" <sbisker at harvardgrp.com>
To: <asterisk-users at lists.digium.com>
Reply-To: asterisk-users at lists.digium.com

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