PDP11 PeripheralsHbk 1972 - Trailing-Edge

Modem Compatibility (Typical)
Type Speed (Baud)
Bell 201A 2000
Bell 2018 2400
Bell 3038
Bell 303C
Data and Modem
Control Signals:
Program Interrupts:
Bus Load:
Physical Connection:
19,200
50,000
Space Required:
Power Required:
Temperature/Humidity:
8.4.5 Ordering Information (Models Avai lable)
DEC NO
DPll·DA
DPll·DC
DPll-CA
PREREQU ISITE
PDP-ll
PDp·ll
DPll
Communications Channel
direct distance dialing network Type 3002(C2)
leased line only: Type 3002 (C2)
leased line only: half group (6 voice·band lines)
leased line only; group (12 voice·band lines)
All leads of Bell 201 and 303 modems are brought
into the unit. All leads are EIA RS·232-C and CCITT
compatible for the 201 modem. All leads for the
300 Series are current mode as defined in the ap·
propriate reference manual.
Receive Done, Transmit Done, Carrier Flag, Receive
Overrun, and Ring (If appropriate Enable bits
set)
One line unit represents one unit load to the PDP-
11 UNIBUS. The UNIBUS provides 18 unit loads.
To add more than 18 unit loads a bus extender
(DB11-A) must be used.
For 201 modems. 25-foot cable with RS-232-C
compatible 25-pin male connector. For 303 mod·
ems, 25·foot coaxial cable with appropriate con·
nector.
1 System Unit for one interface.
2.5 Amps of + 5 Volts
0°40 6 C with 20 to 90% noncondensing humidity.
DESCRIPTION
Full/half duplex synchronous line module
set. Double buffered. 6, 7, or 8 bit characters.
EIA/CCITT termination suitable for
direct use with 201 modems. Includes 25foot
modem cable.
Same as above except suitable for direct
use with 303 modems. includes 25-foot
modem cable.
Allows the DPll to handie 10, 11, or 12
bits per character.
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