>I used to have the technical specs for CID around. Prolly still do, but
>can't find them. As I recall (and I could be wrong) the CID signal is
>actually sent some 400ms AFTER the first ring. Do I remember incorrectly?
The CNID signal is sent between the first and second ring signal (why it
is limited to a fairly low number of characters). *How* it is sent
(essentially 1200 baud but not Bell 212) is another limiter.
If the receiving phone goes off hook before or during the CNID transmission,
it will abort.