[Asterisk-Users] Re: what cable to connect a legacy PBX to a TE410P ?

Sat Apr 22 08:40:34 MST 2006

On Sat, Apr 22, 2006 at 08:09:13AM -0700, Paul Mahler wrote:
> A T carrier cable is not the same as an ethernet cable. A T carrier  
> cable uses a real metal shielded RJ-45 and loosely twisted pair wire.  
> With most modern T carrier equipment, you can use a CAT-5 ethernet 
> cable  instead of a real T carrier cable. A T-carrier crossover cable 
> does not  have the same wiring pattern as a crossover ethernet cable. 
> With an  older piece of equipment like the Matra, I would be tempted 
> to purchase  a real T carrier crossover cable. This is covered in my 
> book, by the way. 

I'm just back from the client's site and failed to perform any tests.

When connecting with a straight cat5 cable to the telco's E1 socket I 
got a red status led and RED alarm on the TE410. However when 
reconnecting the PBX's cable, the telco's socket led went back to green.

On the other hand, I tried connecting the PBX's cable to the  TE410 and 
got a green led and REC status. 

What could be wrong?

My /etc/zaptel.conf:

	span=1,1,0,ccs,hdb3,crc4
	span=2,1,0,ccs,hdb3,crc4
	span=3,1,0,ccs,hdb3,crc4
	span=4,1,0,ccs,hdb3,crc4

	bchan=1-15,17-31
	dchan=16

	bchan=32-46,48-62
	dchan=47

	bchan=63-77,79-93
	dchan=78

	bchan=94-108,110-124
	dchan=109

	loadzone=fr
	defaultzone=fr

My /etc/asterisk/zapata.conf:

;; to telco
context=default
signalling=pri_cpe
group = 1
channel => 1-15
channel => 17-31

;; to old pbx
context=international
signalling=pri_net
group = 2
channel => 32-46
channel => 48-62