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5
Special Functions
This chapter describes the special features of the Comet, and offers instructions on how
each is used.
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.
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. The Comet 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.
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.
Use the Caller ID commands listed below to configure your modem:
Command
Function & Description
Disables caller ID. (default)
#CID=0
Enables caller ID with formatted presentation to the DTE. The modem
#CID=1
will present the data items in a <Tag><Value> pair format. The expected
pairs are data, time, caller code (telephone number), and name.
Enables Caller ID with unformatted presentation to the DTE. The
#CID=2
Modem will present the entire packet of information, excluding the
leading U's, in ASCII printable hex numbers.
Caller ID Result Codes
n = 0-2 OK
Otherwise ERROR
Caller ID Inquiries
#CID? Retrieves the current Caller ID mode from the modem.
#CID=? Returns the mode capabilities of the modem in a list with each element
separated by commas.
24 Special Functions
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