[Asterisk-Users] Max calls & IAX2 trunking

[Doug Lytle]

Is it possible to increment a call group (Max_Calls) from one server to 
the next server?

I'm trying to set a maximum call limit between two facilities (2 
Asterisk servers) using Set Group.  I want the limit to be set at 4.  
The problem with the code that I have in place, is it allows for 4 on 
each server, hence the possibility of maxium of 8 concurrent calls.

I need to be able to, when 1 call is placed, that each server sets it's 
Max_Calls to 1, and increases for each additional call.  My code snippet 
below:

exten => _42XX,1,SetGroup(Max_Calls)
exten => _42XX,n,NoOP(Active Calls: ${GROUP_COUNT(Max_Calls)})
exten => _42XX,n,GotoIf($[ ${GROUP_COUNT(Max_Calls)} > 4 ]?103)
exten => _42XX,n,Dial(IAX2/bc.asterisk:xxxx at 192.168.102.15/${EXTEN},,t)
exten => _42XX,103,Congestion()

Is it possible to SetGroup(Max_Calls) on in bound?

Any suggestion?

Thanks!

Doug