Lucent Technologies PARTNER Advanced Communications System Programming And Use Instructions page 175

Caller ID
The lines associated with Caller ID must be connected to a line jack on a
PARTNER ACS processor module, 206EC module, 308EC module, or
400EC module. For more information, refer to the PARTNER Advanced
Communications System Installation guide.
Caller ID information is passed to an extension between the first and
second ring. To receive Caller ID information, wait until the second ring
before answering the call.
Individuals with Call Waiting from the local telephone company will not
receive Caller ID information for the second call.
Not all calls on Caller ID lines are displayed. This varies by local phone
company. When Caller ID information is not captured, the system date and
day (default) displays instead.
The incoming telephone number replaces the system date and time display
on system phones for the duration of the call. An out-of-area message (- - -
- - - - - - - - -) displays if a call is being dialed from a region that does not
support Caller ID. A privacy message (Priv.) displays if the caller has
blocked transmission of Caller ID information.
If you use SMDR, telephone numbers of incoming calls print on call reports
after the call is completed. (Private and out-of-area numbers are reported
as "IN" on call reports.)
5-65