Concurrent calls on ISDN

S

suPerb0b

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Hi all

We manage an Asterisk PABX for a large building that have about a hundred numbers, but only 8 concurrent incoming/outgoing calls can be done on the ISDN.

I was wondering if anyone knows... what happens for a person from outside trying to phone in when all 8 "lines" are busy? Does he get a busy tone or does it keep ringing in his ear even though its not reaching the pabx?

The reason I'm asking, we have two people saying that people tried to phone them, but they never received the call. So I'm thinking either they were already busy on their phone, thus not receiving the second call or those 8 lines could have been busy.
 
If memory serves from years ago, it gave an engaged tone, but as the other poster says it should be easy enough for you test one evening. Do you have one PRI/ISDN30 with 8 channels enabled? Or do you have 4 x BRI/ISDN2’s? In the former maybe you want to consider opening up some more channels. I don’t fully understand your user problem here. Callers might have called the wrong number, or they could just be lieng (mistaken) to you :)
 
We have 4x ISDN2's and we are thinking of opening more channels.
I would have to find 8 people to test with me... or keep an eye on the calls and make one myself when its all congested...

Hmmm, maybe I should write a little script that checks every 10 seconds and emails me as soon as there are 8 channels used.
 
Response you'll get on Asterisk 1.6 -> "All circuits are busy now." In a very American accent.

Why do you use ISDN? You should be going straight SIP/IAX2.
 
We tried selling SIP accounts from Telfree a few years ago and it was just too much effort to maintain and explain to technologically impaired people. They want a local telkom number and we have lots of numbers available.
 
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