asterisk users - Dec 2004 - Wildcard remote looping

Is there something special that needs to be done to allow a T100P/T400
to respond to a remote loop request?

I am having some issues with a Point to point T1 line using zaptel ppp.
This line gave us small problems when we had a pair of Cisco 2600's on
either end but now with the zaptel ppp it is going down every couple of
minutes for 15 intervals.   

The phone company says the line is good to the smartjacks but says they
were unable to loop up the asterisk boxes at either end.  (And there is
a fairly long and untrustworthy cat 5 extension from the smart jacks to
the asterisk boxes.)

Thanks
Mark Farver

Mark Farver wrote:
> Is there something special that needs to be done to allow a T100P/T400
> to respond to a remote loop request?
> 
For a T1 the phone company would expect to see their Network Interface 
Unit (NIU) which can be looped with a special repeating code. Using a 
different repeating code they would expect to be able to loop up a 
Circuit Service Unit (CSU). The NIU belongs to the phone company. The 
NIU would belong to the customer.

A CSU is not needed for voice TDM services and so does not usually exist.

I do not believe the Digium T1 cards have built in the CSU functionality 
and so the phone company will not be able to loop it. When I have talked 
with the phone company I just tell them that there is not a CSU.

If CSU functionality is required, it would require a change to the driver.

Don Pobanz

We usually put an Adtran CSU ACE inline with the asterisk box and the Voice
T1 that way if the LEC wants to loop a CSU they can.  An Adtran CSU ACE just
passes the traffic as it receives it, there is no setup involved.

Henry Devito
Telephone Connection, Inc
Network Design / Implementation
Phone: 402.330.7510
Fax:    402.330.8586
 
Toshiba CTX/DK/Stratagy Certified
Cisco Certified Internetwork Expert (CCIE) Voice ( VoIP)
Cisco Certified Internetwork Expert (CCIE) Routing and Switching
MCSE Microsoft Certified Systems Engineer
RHCE Red Hat Certified Engineer

       
> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-
> bounces@lists.digium.com] On Behalf Of Don Pobanz
> Sent: Tuesday, December 28, 2004 5:27 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Wildcard remote looping
> 
> Mark Farver wrote:
> 
> > Is there something special that needs to be done to allow a T100P/T400
> > to respond to a remote loop request?
> >
> 
> For a T1 the phone company would expect to see their Network Interface
> Unit (NIU) which can be looped with a special repeating code. Using a
> different repeating code they would expect to be able to loop up a
> Circuit Service Unit (CSU). The NIU belongs to the phone company. The
> NIU would belong to the customer.
> 
> A CSU is not needed for voice TDM services and so does not usually exist.
> 
> I do not believe the Digium T1 cards have built in the CSU functionality
> and so the phone company will not be able to loop it. When I have talked
> with the phone company I just tell them that there is not a CSU.
> 
> If CSU functionality is required, it would require a change to the driver.
> 
> Don Pobanz
> 
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