Specifications

DXP Correspondence Manual
introducing The DXP
Communications Card
The auxiliary board also supports the communications card
.
(DXOPT-COM); the DXP has two serial data ports on the CPU
board. Each communications card provides four additional serial data
ports; you may need these ports for additional PC Attendants or
printers, for example. Keep in mind that the two serial ports on the
CPU board are the only two true-high-speed ports. Depending upon
system traffic, the serial ports on the comm. card may not operate at a
true 9600 baud rate. You can install up to two corn-cards on each
auxiliary board, but you must install them on the bottom two slots of
the auxiliary board. For more information on the Corn. card, see
IMI89-124.
Synchronization Card
Finally, the DXOPT-SYN, or sync. card, adjusts the DXP Tl transmit
frequency to match the frequency received from the central office or
master DXP. You only need a sync. card if you are using the Tl
board, and you can only install one sync. card into the DXP. If your
Tl board is connected to the C.O., you must have a sync. card. If you
have two DXPs connected together with the Tl configured as E & M
tie lines, only one DXP must have a sync. card. For more information
on the sync. card, see IMI89-141.
Introducing The DXP I- 15