-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Christian
Sent: Sunday, June 12, 2011 1:51 PM
To: [email protected]
Subject: Re: [asterisk-users] A question about Caller ID

Hi,
over anlog lines.
Many thanks,
Christian




Bell 202 modulation between the first and second rings...

Read the "operation" section from the following link.
http://en.wikipedia.org/wiki/Caller_id


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