[Asterisk-Users] ISDN transfer, handoff to masterswitch

[Alex Mack]

Hi!

I've setup * with a Junghanns.net QuadBRI card agaisnt an Ericsson 
MD-110 PBX. All four ISDN channels are setup to simulate  EuroISDN 
Point-to-Point ("Anlagenanschluss" in Germany) from the Ericsson's side. 
Works well and I have had little problems at all.

Now what's happening during a call transfer of an ISDN call to another 
ISDN destination? Does such a transfer block 2 b-channels (one in and 
one out)? Or is it automatically handed off to the Ericsson so * is out 
of the loop? Is EuroISDN capable of such a handoff? Or do I have to use 
another protocol like Q.SIG for that feature?

I don't have experience with Q.SIG at all. I was happy * worked with the 
EuroISDN trunk so well. But there's the issue with congestioning the 
link to the PBX with too many (in my case 4) forwarded calls.

Does anyone have experiences with this? Are there references for Q-SIG 
out there?

Thanks!

Alex Mack