[Asterisk-Users] Problem with Connecting PBX to Asterisk

[qrss]

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.

-----Original Message-----
From: Karthik Natarajan
Sent: Tue, June 21, 2005 3:47 pm

We have an old Telrad 128KSU PBX to which I am trying to connect asterisk
> in
the following manner:

Current Setup:

Telco-> T1->PBX

Desired Setup:

Telco-> T1-> Asterisk-> T1-> PBX.

I am first trying to setup the Asterisk -> T1->PBX part without disturbing
existing setup so I can get asterisk to forward calls to PBX and once that
is done, I would try to move the telco from pbx to Asterisk.

I have 2 T1 cards on my PBX (1 for current telco and 1 for connecting
asterisk)

I have a TE405P card on the Asterisk server with span 2 connected to the
> pbx
via a T1 crossover cable.

My PBX T1 config is set to ESF, B8ZS and E&M Wink.

My zaptel.conf has the following:

Span=2,0,0,esf,b8zs  ;connecting port 2 of TE405P card to pbx, leaving
> port
1 for porting telco later
e&m=25-48
loadzone=us
defaultzone=us

my Zapata.conf has the following:
group=1
context=default
signalling=featd ; em_w ;have been trying both in various combinations
switchtype=national
channel => 25-48

my extensions.conf has the following sample dialplan:

exten => 233,1,Dial(Zap/g1/9233)
exten => 241,1,Dial(Zap/g1/9241)
exten => 253,1,Dial(Zap/g1/9253)

I want that if someone calls in to asterisk and dials 233 it should
> forward
the call to my pbx via the T1 and send 9233 and my pbx has a DID route for
9233 to ring 233. Similarly for others.

I am stuck at my pbx not showing a green light on the T1 card, while the
TE405P seems to sense the pbx and shows a green light on the card on
asterisk box.

The pbx is connected to asterisk using a T1 crossover cable. I tried a
straight cable but then the TE405P starts showing a blinking red.

Can anyone please help?

Karthik Natarajan
karthik at infoprocorp.com

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