[Asterisk-Users] Problem with Connecting PBX to Asterisk

[Karthik Natarajan]

As suggested by you, I have tried the timing parameter with 0 an 1 both but
to no avail.

Signalling I have tried are both em_w and featd (suggested by digium tech
support).

Zap show channels shows all 24 channels to be ok with no alarms.

Zttool also confirms that.

The problem is that the pbx (telrad) does not even seem to sense the T1 that
is plugged in. No yellow and no green. Only the RED LED glows. But when I
try a T1 loopback plugged into that the card turns green on telrad
suggesting that the card is fine. (T1 loopback build using a small connector
with 1 to 4 and 2 to 5 connected).

Also regarding timing, I do have 2 X100Ps installed so I wonder if this
needs to be primary source of timing?

As I mentioned earlier I am getting a GREEN on asterisk side (TE405P card)
while a red on the pbx side (TELRAD)


Any thoughts?

>Clock source will be important here.  For phase one, you should probably
>set asterisk to time from the PBX since the PBX is likely timing from the
>T1 circuit.  At phase two, you will likely want to reverse this having
>your PBX clock from the Asterisk system and having Asterisk clock from the
>telco T1.  This of course assumes that there is only 1 Telco T1 involved. 
>Timing is the first most important consideration.  After that, you want to
>verify that both ends are using the same signalling type (it appears that
>you are using CAS signalling). Check that your PBX is using CAS and find
>out exactly what type.  Zapata will need to be configured to use the same
>type of signalling.  Check both sides looking for any red alarms etc that
>might indicate a cable problem.  From the CLI, 'zap show channels' or
>using zttool
>from the command line should help you determine the status of the link. 
>Red alarms usually indicate that this end sees an out of frame condition
>while a yellow means that the opposite side sees and out of frame. A
>yellow on one side is a red on the other.



Karthik Natarajan
InfoPro Corporation
732-283-2589 x 241
karthik at infoprocorp.com

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