3Com Courier, Reference

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Call Detectio
Call Detection allows the modem to recognise whether an incoming call
is analogue data or fax.
Call Detection is an optional Service Class 2.0 feature and is also
implemented by 3Com for Fax Class 1 applications.
Caller ID Functions
Caller ID is a service provided by local telephone companies. When you
subscribe to Caller ID, your phone company begins providing you
real-time information about incoming calls.
The Caller ID signal includes the date and time of the call, the phone
number of the calling device, and, optionally, the name of the calling
party. The signal is sent between the first and second rings and must be
decoded and displayed by a device connected to your phone line. The
Courier V.Everything modem has the ability to decode and display the
Caller ID information.
Service Types You can subscribe to Basic or Extended Caller ID service. Basic service
offers you the date and time of the call and the calling party’s telephone
number. Extended service provides the billing name associated with the
calling party’s telephone number in addition to the Basic service
information
The information the Courier V.Everything modem actually receives
depends on the service type to which you’ve subscribed, the information
that the calling party’s telephone company provides, and whether the
equipment in between supports Caller ID. At minimum, you will always
receive the date and time that a call arrived.
If a call arrives without a Caller ID signal, the modem will send OUT OF
AREA in place of the phone number and name. If the Caller ID
information has been blocked by the user at the other end, the Courier
V.Everything modem will send PRIVATE in place of the phone number and
name.
Applications of Caller
ID Technolog
You can use Caller ID to screen calls, keep a record of calls, or prevent
unauthorised access to your network. Third-party database an
telephony applications such as security, call logging, and black-listing
applications exploit the Caller ID information provided by the Courier
V.Everything modem.