PARAMETER 56:
Handshake
Duration
SLOT 1 HANDSHAKE 1 SEC M/DD/YY HH:MM:SS
Background:
Whenever the Digital Communicator at a subscriber's premises is triggered,
it calls the Central Station and waits for confirmation that the Digital
Receiver is ready to accept its report. This confirmation, known as a
handshake
signal, is a tone sent from the Receiver back to the
Communicator, indicating that the Receiver is "on-line" and ready to process
data from the account (see Figure 1-1 on page 1-2).
Because many kinds of Communicators and communication standards exist
today, there are also several different types of
handshake
signals that
Digital Receivers like the CP-220A must be capable of generating. Often, the
type of
handshake
tone sent back to the communicator reflects the kind of
transmission format the Digital Receiver is able to process, and serves to
prompt the communicator to transmit its data in that format.
PARAMETER 07
(see page 2-15) covered the three kinds of
handshake
signals that can be produced by the CP-220A.
PARAMETER 56
allows the
duration
of the handshake signal to be specified – also on a Line Card-by-
Line Card (Slot-by-Slot) basis – because certain reporting formats may
respond better to a longer handshake, especially if noise is experienced on
the phone line.
NOTE: PARAMETER 56 will work for REC-11 Line Cards using Version 2.0
or later; or for REC-1 Line Cards with Version 2.5 or later.
Programming Options:
PARAMETER 56
permits each of the CP-220A's 8 slots to be programmed to
deliver either a
1-second
or a
2-second
tone that will affect both the
high-frequency
(2300 Hz) and the
low-frequency
(1400 Hz) handshake
signals capable of being produced by each Line Card. Note that the
Hi/Lo
handshake signal (see
PARAMETER 07)
will be unaffected by selections
made in this parameter.
Programming Procedures:
After entering
PARAMETER 56,
[SLOT 1 HANDSHAKE 1 SEC] will be
displayed. The number [1] after [SLOT] will be flashing. If it is necessary to
change the duration of the fixed handshake tones (i.e., 2300 Hz and 1400 Hz
only) for Slot 1, or any other slot, do the following:
1. Depress
the key once. The [1] after [HANDSHAKE] will begin to
flash.
2. If necessary, press the
NEXT
key or the
MANUAL/PREVIOUS
key to
change the duration of the signals to 2-seconds.
CP-220A Central Station Receiver Section 2: Programming the CP-220A Page 2-49
Hook-Up and Installation Manual