[asterisk-users] Bridging of PRI calls

[Johann Steinwendtner]

Matthew Fredrickson schrieb:
> 
> On Oct 12, 2006, at 1:17 PM, Johann Steinwendtner wrote:
> 
>> Hello !
>>
>> I 've some questions how bridging of ISDN calls is done.
>> Assume an asterisk system with a TE405 card equipped.
>> (PRI1 - PRI4)
>> An incoming ISDN call on PRI1 is transfered back to
>> PRI3. Unless there is DTMF detection or other things
>> involved, the bridging is done without Asterisk. Does
>> this card have a some sort of cross connection ? Does
>> the PCM leave the card ? Or is there some DMA magic in-
>> volved ?
>> Assume an asterisk system with two TE405 cards equipped.
>> An incoming ISDN call is transfered back to the second
>> TE405 card. Does this card have a seperate bus like H.100 ?
>> How is the bridging done in this scenario ?
> 
> 
> If the call is between two spans on the card, there is an internal 
> "H.100-like" bus that cross connects the timeslots.
> 
> Matthew Fredrickson
> 

How is the situation between two cards ?  Is there a kind of
DMA mechanism involved, or does asterisk cross connect the timeslots ?

Thanks !

Hans