[Asterisk-Users] How to Restrict Number of Lines

[Daniel Salama]

Hello,

I have the following scenario:

Main_Asterisk_Server <----IAX----> Client_Asterisk_Server <----> 
Client_SIP_Stations

Basically, I have a master * server and I'm offering telephony services 
to a client of mine. However, even though my client has 10 SIP 
stations, they only want to pay for 4 telephone lines. How can I 
configure the Asterisk servers so that if 4 SIP stations are on the 
line, if the 5th one tries to make a call, he/she would get Congestion. 
Also, if 4 of their SIP stations are on the line and a 5th incoming 
line gets to the Main_Asterisk_Server, it should play a Busy tone and 
hang up.

I know I could create a group of channels in my T1s in 
Main_Asterisk_Server and whatever the size of that group is (e.g. 4), 
that will restrict the client. However, given that I have many clients 
with a similar server, I don't want to "dedicate" the channels on my 
T1s to these clients. I just want to have a pool of channels from all 
my T1s available to all my clients and restrict channel usage in some 
other way.

Did I make any sense? Hope you understood what I'm asking for.

Thanks,
Daniel