and the caller id shows in test set.
Ok that omits the Telco.
Now for your programming.
If voice mails answer make sure it answers at 2 rings an no less since the signal is sent between 1st and 2nd ring.
Reception must not answer calls on the first ring for above reasons.
All other sets must use F811 unless the call was transferred by somebody who answered the original call on the 2nd ring or vmail answered on the 2nd ring.
The set must have lines ring at the set to have Call ID.
Call ID must be set to Y in Terms&Ssts
Lines must be assigned in Telco features.
6.0 an under Auto Caller ID is only given to recepetion.
Like Marv states...what country you in?