[asterisk-users] How to set BRI-to-BRI trunk using 2 HA8+B400M cards [SOLVED]

[Olivier]

2011/6/22 Richard Mudgett <rmudgett at digium.com>

> > The link between the Asterisk boxes must not be terminated on both
> > ends. Termination resistors on both ends is practically guaranteed
> > to cause link issues.
> >
> >
> > Very interesting but I'm afraid I still don't get it.
> >
> > For various reasons, my goal is build an asterisk + patton solution
> > that will be later plugged into 8 BRIs like this (hoping my ASCII art
> > will work) :
> >
> > Patton ------------ x4 BRI ----------------PSTN
> > | |
> > | |
> > Asterisk1 -------- x4 BRI--------------------
>
> Connections like this?
> Patton ------ x4 BRI --- PSTN
> Asterisk1 --- x4 BRI --- PSTN
> Asterisk1 --- BRI?? ---- Patton
>

Asterisk1----- <SIP>----- Patton


>  (Cross link between Asterisk1 and Patton (Beware of potential clock loop))
>
> >
> > The box Asterisk2 ast I referred to it previously, is here to behave
> > as the PSTN.
> > As a consequence, I tought that :
> > 1. I should set each Asterisk2 port as NT/PTP.
>
> The NT/PTP port should not have termination resistors enabled.
>
> Richard
>
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Theorically, does the order with which cables are plugged into a box matters
(as fas as Termination setting is concerned) ?

I'm asking because, thanks to your advice, it is working today tough the
same settings (it seems) failed yesterday.

For reference, here are my settings:

AST1 ----<BRI>---- AST2 ----<BRI>---- Patton

AST1:
span=1,1,0,ccs,ami,term,te
signalling = bri_cpe

AST2 (port1 to AST1):
span=1,0,0,ccs,ami,term,nt
signalling = bri_net

AST2 (port2 to Patton):
span=2,0,0,ccs,ami,nt
signalling = bri_net


Other experimental findings:
When connecting one Asterisk box in NT mode to a single box (either an
Asterisk box or a Patton), is does work no matter how termination is se (for
this NT box).

When connecting one Asterisk box in NT mode to 2 boxes (an Asterisk box and
a Patton), then termination settings matter.

Anyway, thank you very much for your help.
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