There are three kinds of
handshake
signals that can be produced by the
CP-220A:
• The
2300 Hz
(Hertz, or
cycles per second
) handshake signal is a "high-
frequency" tone that is generally interpreted by Digital Communicators as
an "invitation" to communicate in a
High Speed
format.
• Similarly, the
1400 Hz
handshake signal is a "low-frequency" tone that is
generally sent by the Receiver if there is no response to its initial 2300 Hz
handshake signal. The 1400 Hz tone invites the Digital Dialer to
communicate in a
Low Speed
format.
• The
Hi/Lo
handshake signal is really two distinct tones that use both the
2300 Hz and 1400 Hz frequencies, and is used with the
ADEMCO High
Speed (Superfast), ADEMCO Express,
and ADEMCO
Point I.D.
(i.e.,
Contact I.D.
) communication formats. In the event that there are
ADEMCO
dialers reporting in these formats, it will be necessary for the
CP-220A to transmit at least
one
Hi/Lo handshake signal.
NOTE: See
Appendix B
for additional information.
Digital Communicators, after receiving a handshake signal from the Central
Station, will respond only if the handshake corresponds to the data format
the Dialer has been programmed to send. If the handshake is not responded
to, the CP-220A will produce an alternate handshake that the Dialer should
find compatible.
Programming Options:
The programming for
PARAMETER 07
specifies whether or not each of the
CP-220A's Line Cards will send the
Hi/Lo
handshake signal, and if so, how
many times (up to 2).
[SLOT 1 HI/LO IS 1] will be displayed after entering
PARAMETER 07.
The
number [1] after [SLOT] will be flashing. Each of the 8 slots can be
programmed to deliver between zero and two
Hi/Lo
handshakes if that's
desired or necessary. Note that only one
Hi/Lo
handshake is required for
Communicators transmitting in the
ADEMCO Superfast
or
Point I.D.
format, although two such handshakes can be programmed to increase the
chances for a successful connection when noisy phone lines are encountered.
Page 2-14 Section 2: Programming the CP-220A CP-220A Central Station Receiver
Hook-Up and Installation Manual