[Asterisk-Dev] Re: Asterisk-Dev Digest, Vol 9, Issue 49

[Eugenio De Vena]

No VIC-2BRI NT/TE are both NT and TE it is just a matter of configuration 
and
this provider ( Fastweb ) brings to you the ISDN lines via these interfaces.
The problem is that VIC-2BRI put the A1 (sending complete) message at the
complete end of the Q.931 SETUP message and not after the "call reference" 
field, which
is what "libpri" patched for J4BRI expects.
Unfortunately the J4BRI is completely unsupported by the producer...



>the vic2bri is a TE interface. You need a straight cable and set the
>quadbri to NT mode. At least it sounds like it is that way to me :)


On 4/12/05, Eugenio De Vena <edevena at gsy.it> wrote:
>>
>>
>> Hello Everyone,
> I am working with a J4BRI and it works ok with our national provider (
> TelecomItalia ) and when connected
> to ISDN pabx ( Ericsson and Tenovis ). We now have switch to a new telco
> provider ( Fastweb ) which brings
> you S0 via Cisco 1760 VIC-2BRI interface. They say ( and Cisco says ) that
> VIC-2BRI emulate perfectly the
> national isdn standard, but I found that it is not true. First of all I 
> have
> to switch 3-4 and 5-6 pin of the isdn cable,
> otherways is not going to work, not too bad but anyway... The critical 
> thing
> is that I can not receive calls!
> The normal ( telco and pabx ) Q931 SETUP message arrives like this:
>
> 08 01 2c 05 a1  04 03 80 90 a3 where:
>
> 08 means Q931 message
> 01 length of call reference field
> 2c call reference field
> a1 sending complete
> 04 next is bearer cap
> 03 80 90 is bearer cap
>
> and so on
>
> when I connect the J4BRI to the VIC-2BRI I receive
>
> 08 01 2f  05 04 03 80 90 a3 ....... a1
>
> so the a1 ( sending complete ) arrives at the end of the SETUP message.
> After the bearer cap , the
> calling number and the called number.
>
> Asterisk does not recognize this byte stream as a SETUP message and so
> discards it.
> I post it here as in asterisk-users no one seems to be able to help me
> Best regards
>
>
> ________________________________________