Motorola 68230 - Vanguard 300 DSU/CSU Operator's Manual page 27

Vanguard 300 CTP Cabling
On the Vanguard 300, Port 4 uses a 6-pin modified modular jack (RJ-11/MMJ) as
its connector (also referred to as a DECconnect connector). The cable can be a flat
ribbon telephone cable with a recommended length of 6 to 10 feet.
Vanguard 300 Cabling Pinouts
The pinout on the connector follows:
Pin Signal
1 DSR (output)
2 RxD (output)
3 Signal ground
4 Signal ground
5 TxD (input)
6 DTR (input)
Vanguard 305 CTP Cabling
On the Vanguard 305, Port 4 uses a straight-through 8-conductor RJ45 cable (e.g.,
Inmac P/N Q0462-1 or Black Box P/N RM-EL08MS-07. An RJ45 to DB25
(female) adapter (e.g., Inmac P/N Q0352-2 or Black Box P/N RQ-FA027) can be
constructed using the following pinout information:
Vanguard 305 Cabling Pinouts
RJ45 Pin No.
1
2
3
4
5
6
7
8
Signal DB25 Pin No.
Not used 5
DTR (input) 6
TxD (input) 3
Signal ground 7
Signal ground 7
RxD (output) 2
DCD (output) 20
Not used 4