[Asterisk-Dev] strange Q931 SETUP coming from Cisco VIC-2BRI

[Michael Bielicki]

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 
>   
>   
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-- 
Michal Bielicki
http://www.aefirion.org/
http://www.asterisk.com.pl/