[Asterisk-Users] PRI litmus test

[Peter Svensson]

On Wed, 1 Dec 2004, Enoch Root wrote:

> I'm diagnosing a problem related to PRI card.  I would
> like to know the following: assuming I've got a
> working PRI card and correctly installed Linux drivers
> and a PRI line connected to the card, even without
> starting asterisk, shouldn't I hear a ring tone when I
> dial the number?  I'm getting busy tone all the time.

Without a a correctly coded q.931 conversation driven by a program the
central office is likely to (should really) consider the line down and
signal an error. If you tried phoning from an isdn equipment you would
likely see a cause code that explained the situation better.

First make sure that the lower level is connected correctly. Run zttool 
and make sure you are not seeing a local red alarm or any remote alarms. 
You may need to start Asterisk to get the span started, I am not sure. 
When zttool shows the span to be up you can start working on the upper 
layers.

Peter