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10.3 Caller Number Delivery (Caller ID)
Caller Number Delivery (CND), commonly called Caller ID, is a new kind of phone service
that may be offered by your local phone company. Check your phone company for
availability. You must subscribe to it and usually pay an additional monthly service charge
this service.
With CND service, the phone company's central office will send the coded caller
information to the called station. This information is sent once between the first and
second rings. Your modem can decode this caller information and present it to the
connected computer/terminal during the second ring period as part of the call progress
ring message. The modem will also report the Caller ID information if asked by the
AT*T
command
.
There are two kinds of caller information message formats sent by the phone company.
One is the single message format which includes date, time, and caller ID.
The other is the multiple message format which also includes the caller name as
registered with the phone company.
ATS40.2=n
The command
detection function. The default is disabled. Enable it only when you have this service and
want to enable its detection.
Note: The Caller ID message may cause some confusion to a communication software
that is not expecting it. If you plan to use the Caller ID feature, be sure you are using
software that supports it (such as ZFAX).
In single message format, the modem will send a ring message to the terminal as follows:
RING
TIME: <MM-DD hh:mm>
CALLER NUMBER: <CALLER_ID> or CALLER NAME:<CALLER_NM>
Special Functions
is used to enable (n=1) or disable (n=0) the Caller ID
U-90E Data/Fax Modem
10-5
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