[asterisk-users] Problems Connecting Two Asterisk Installs Via ISDN PRI Cards

[Forrest Beck]

Brian,

I hope this helps, it is slightly different from what you have  
setup.  Here is what I used to connect my asterisk server to our  
Norstar Meridian.  The Norstar T1 was setup as pri_cpe with the 24th  
channel as D. Check out this webpage for making a T1 crossover cable :
http://www.voip-info.org/wiki/view/crossover+T1+cable

You should also try making/obtaining a T1 loopback adapter and test  
both cards.
http://www.adtran.com/adtranpx/Doc/0/FMPI9MBKGJBH39S8038BE81ID8/ 
CU-2abf1b83844b11d78ff20c045003.html

Just curious, which cards are you using?

On zapata.conf below in the norstar section, I set my timing source  
to be 0.  This is because I am getting timing from the first span.   
If you are only connecting the two machines together and neither one  
has other T1's going to a telco.  Then just set one of them as  
primary (1) and the other as do not use (0).
span=(spannum),(timing),(LBO),(framing),(coding)


Zaptel.conf
--------------
loadzone=us
defaultzone=us

#PRI to TimeWarner
span=1,1,0,esf,b8zs
bchan=1-23
dchan=24

#PRI to Norstar Meridian
span=2,0,0,esf,b8zs
bchan=25-47
dchan=48

#TDM800 Card
fxoks=49-52
fxsks=53-56

Zaptel.conf
--------------
[channels]
;Time Warner T1 (SPAN 1)
context=tw-pri-in
group=2
;Echo Cancel turns on the Octastic Hardware Canceller on the card
echocancel=yes
; Tell Asterisk to reset the channels every two hours
resetinterval = 7200
; Relax DTMF
relaxdtmf=yes
rxgain=0.0
txgain=0.0
signalling = pri_cpe
switchtype = national
channel => 1-23

;Norstar T1 (SPAN 2)
context=norstar
group=3
signalling = pri_net
channel => 25-47





Forrest Beck
jonforrest.beck at gmail.com
www.shift8.biz



On Sep 21, 2007, at 9:31 AM, Brian Alexander wrote:

>
> On 9/20/07, Jared Smith <jsmith at digium.com> wrote:
> I'd look at your wiring, as an HDLC error like that is usually an
> indication of some type of a problem at the physical layer.
>
> I tried two other cables this morning with the same results...
>
> While I was swapping cables around I unloaded asterisk and the  
> zaptel modules. One thing I noticed once everything was hooked up  
> and restarted is that Machine2 shows a red alarm but Machine1 shows  
> both spans as clear of alarms... Otherwise everything looks the  
> same as yesterday.
>
> Have any of you connected two asterisk machines by t1 crossover  
> using pri_net/pri_cpe signaling? I am completely stumped and would  
> love to know that some had done this and what their configuration  
> look like.
>
> Thanks again,
> -Brian
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