[Asterisk-Users] Public switches (AXE10) not capable of handling sustained call setup bursts on E100P

[Knut Bakke]

Hi,
I'm running a simple test from asterisk towards a
public telco switch (AXE10) over E100P.

Here is the test case:
1) 30 calls are setup simultainously, 20 sec ringing
time. 
2) no calls answers (just calling a vacant public tax
office :=)
3) Each channel will continue on its own with the same
proceedure: ring for 20 sec, then hangup, ring for 20
sec, and so on.

Of course this leads to massive signalling on the
D-channel. 

Result:
After one or two minutes, the number of acks from the
public switch dropps sharply. At the end there are
only messages in one direction (from asterisk to
public switch), except for some RNR (Receiver Not
Ready) message from public switch.

This leads of course to T200 timeouts, which very soon
hits 3, and the D-channe is reset (and all calls
terminated).

I can not see any weird behaviour from asterisk. When
RNR is received, it stops sending setup messages to
the far end. Which is correct.

We have managed to agree on a test session with the
telco, but first I would like to know if anyone else
has experienced this.


Knut Bakke.



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