[Asterisk-Users] RE: Need More Simultaneous Voice Channel Capacity on Asterisk

[Tadepalli, Hari K]

(Sorry for resending. I forget to attach screen dump from Asterisk console in the first attempt). 

We are testing Asterisk (1.2.5, configured for an IP PBX) for the number of simultaneous multiple VoIP calls supported. Whenever we increase the number of SIP end points over 250, or the equivalent of 125 caller-callee pairs, our testing fails. In fact, adding even one additional pair of end points over the 250 makes all end points fail. I have pasted the console diagnostics posted by Asterisk below. 

Is there any inherent limitation either in Asterisk or Linux system resources that restricts the SIP end point count to 250? I though Asterisk is an open source SW with no restriction on the number of SIP endpoint seats. As I could see, my CPU has plenty of slack (idle time) left when tested with 250 SIP end points. Hence the desire to increase the simultaneous channel capacity of Asterisk. 

If you have configured your Asterisk IP PBX to serve more than 250 SIP end points, I would appreciate some help. 

Thanks, 

Hari Tadepalli
 
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Intel Corporation
Communications Infrastructure Group
Chandler, AZ
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Everyone is busy/congested at this time (1:0/1/0)
    -- Executing Hangup("SIP/1193-4934", "") in new stack
  == Spawn extension (from-sip, 1449, 2) exited non-zero on 'SIP/1193-4934'
    -- Executing Dial("SIP/1065-5adb", "SIP/1321 at 192.169.200.10") in new stack
    -- Called 1321 at 192.169.200.10
    -- Executing Dial("SIP/1193-14a4", "SIP/1449 at 192.169.200.10") in new stack
    -- Called 1449 at 192.169.200.10
    -- SIP/192.169.200.10-9ef8 is circuit-busy
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Executing Hangup("SIP/1065-5adb", "") in new stack
  == Spawn extension (from-sip, 1321, 2) exited non-zero on 'SIP/1065-5adb'
    -- SIP/192.169.200.10-f482 is circuit-busy
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Executing Hangup("SIP/1193-14a4", "") in new stack
  == Spawn extension (from-sip, 1449, 2) exited non-zero on 'SIP/1193-14a4'
    -- Executing Dial("SIP/1193-7d31", "SIP/1449 at 192.169.200.10") in new stack
    -- Called 1449 at 192.169.200.10
    -- Executing Dial("SIP/1065-487a", "SIP/1321 at 192.169.200.10") in new stack
    -- Called 1321 at 192.169.200.10
    -- SIP/192.169.200.10-807e is circuit-busy
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