Common Equipment cards 37
QPC742 Floppy Disk Inte-rface
System Hardware-All
Purpose--interface
between the Floppy Disk Unit (FDU) and one CPU.
Provides address matching, disk drive control, data buffering and interrupt
control circuits.
Quantity-One
per CPU
QPC757 D-Channel Handler Interface
System Hardware-All
Purpose-The
D-Channel Handler Interface @CHI) card processes the
LAPD protocol for ISDN primary rate signaling channel and ISDN
Signaling Link (ISL). It also provides a single asynchronous Serial Data
Interface (SDI) port.
Quantity-One
per 16 PRI links to the same location (eight maximum per
system)
QPC841 Four-Port Serial Data Interface
System Hardware-All
-
Purpose-Provides
four serial ports between the system processor and an
external device. Each port supports
-
RS-232-C interface
-
8-bit ASCII data with parity and stop bit
-
asynchronous, start-stop operation
-
data rates of
300,600,1200,2400,4800,
and 9600 baud
-
Data Terminal Equipment (DTE) mode
-
Data Communication Equipment (DCE) mode
Quantity-Up
to four per system
Equipment identification and ordering information 553-3001-l 54