When the
Rotary
or
Rollover
type of phone system is used, every Subscriber
Account calls the same phone number and awaits routing to the next "open"
line before generating its alarm or trouble transmission. Since it is
unpredictable as to which of the phone lines will be available at any given
time, there is no way of knowing which of the CP-220A's Line Cards will be
processing the data. In situations like this, each Receiver slot must be
assigned the
same
Group Number to avoid confusion.
For this reason, the maximum number of accounts that can be processed by
Receivers connected to a
Rotary
or
Rollover
phone system cannot exceed the
maximum number of accounts available to any single Line Card (up to
65,000 with hexadecimal in use). Although this is a limitation in the use of
Rollover
systems, a greater number of individual Line Cards found in a
Receiver enables better call throughput.
Programming Procedures:
For Receivers using separate phone lines, the numbering of the CP-220A's
slots should be left as pre-programmed by the factory. In other words,
Slots
1 through 8
will correspond to
Groups 1 through 8
by default.
For use with
Rotary
or
Rollover
systems, program each slot with the
same
number.
As stated, [SLOT 1 IS IN GROUP 1] will be displayed after entering
PARAMETER 05.
The number [1] after [SLOT] will be flashing.
If it is necessary to change Slot 1's
Group Number
from
Group 1
to
something else, take the following steps:
1. Depress the
key once. The [1] after [GROUP] will begin to flash; the
Group Number
of
Slot 1
may be altered at this time.
2. Press the
NEXT
key or the
MANUAL/PREVIOUS
key until the desired
choice is reached. After doing so,
Slot 1
will be assigned to the chosen
Group.
3. Press
the key so that the [1] after [GROUP] flashes again.
4. To assign another
Slot
to a new
Group,
press the number key of the slot
desired (e.g.,
2
); the chosen
Slot Number
and its currently assigned
Group Number
will be displayed.
5.
Repeat the above steps for each
Slot Number
to which you desire to
assign a new
Group.
Slots 1 through 8
can be programmed to any
Group 1 through 8,
as desired.
Default:
Slots 1 through 8 have been assigned to Groups 1 through 8, respectively,
through the factory defaults. Change this only if a
Rotary
or
Rollover
telephone system is in use for the CP-220A.
CP-220A Central Station Receiver Section 2: Programming the CP-220A Page 2-11
Hook-Up and Installation Manual
