Missed call communication protocol

Rodney Arne Karlsen rodney at ws.co.za
Wed Feb 7 15:08:48 CET 2007

Hi there

While you can choose your callerID when using a sip server, it may not stay 
the way you set it once it passes through the PSTN gateway. I tried playing 
with CallerID stuff some time back here in South Africa and our PSTN provider 
will only allow you to set your caller ID to a number that is assigned to the 
line you are using. If you are lucky enough to have a PRI line then you start 
with around 100 numbers. 

Sorry to throw a spanner in the works but I'm not sure that this will work 
here. It may work in other countries. I think I heard about it working in the 

Rodney Arne Karlsen
LPIC-2, Linux+
Product Development Engineer
Walters Systems

Telephone: +27 31 571 1500
Facsimile: +27 31 571 1519
MSN Messenger: rodney at ws.co.za
Website: http://www.ws.co.za

Put your hand on a hot stove for a minute,
and it seems like an hour. Sit with a pretty
girl for an hour, and it seems like a minute.
That's relativity. - Albert Einstein

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