Pinout Specifications

• B-25 serial male-to-male null modem cable. This cable is used to connect a data terminal equipment (DTE) device (terminal) to the C0 port.

This cable is available from most computer equipment suppliers.

• Male-to-male straight-through RS-232 cable. This cable is used to connect a data communication equipment (DCE) device (modem) to the C0 port.

This cable is available from most computer equipment suppliers.

• T1/E1 category 5 twisted pair cable, as specified by the EIA/TIA-568-B wiring standard, with an RJ-48C connector. This cable is used to connect a T1, channelized T1, E1, or ISDN PRI line to the T1/E1 port.

One of these cables is included for each T1/E1 port. Additional cables are available from most computer equipment suppliers.

Null Modem Cable

Null Modem Cable Pinout

PortMaster 3 Serial Port (C0)				Terminal Serial Port
DB-25 (DTE)	Signal	Definition	Direction to or from the PortMaster 3	DB-25 (DTE)	DB-9 (DTE)	Signal
2	TXD	Transmit Data	Output	3	2	RXD
3	RXD	Receive Data	Input	2	3	TXD
4	RTS	Request to Send	Output	5	8	CTS
5	CTS	Clear to Send	Input	4	7	RTS
6, 8	DCD	Data Carrier Detect	Input	20	4	DTR
7	GND	Signal Ground	N/A	7	5	GND
20	DTR	Data Terminal Ready	Output	6, 8	6, 1	DCD

Straight-through Cable

Straight-through Cable Pinout

PortMaster 3 Serial Port (C0)				Terminal Serial Port
DB-25 (DTE)	Signal	Definition	Direction to or from the PortMaster 3	DB-25 (DCE)	DB-9 (DCE)	Signal
2	TXD	Transmit Data	Output	2	3	TXD
3	RXD	Receive Data	Input	3	2	RXD
4	RTS	Request to Send	Output	4	7	RTS
5	CTS	Clear to Send	Input	5	8	CTS
6	DSR	Data Set Ready	N/A	6	6	DSR
7	GND	Signal Ground	N/A	7	5	GND
8	DCD	Data Carrier Detect	Input	8	1	DCD
20	DTR	Data Terminal Ready	Output	20	4	DTR

T1/E1 Cable

T1/E1 RJ-48C Connector Pinout

PortMaster 3 T1/E1 RJ-45 Ports
RJ-48C	Signal	Definition	Direction to or from the PortMaster 3
1	RXD (Ring)	Receive Data	Input
2	RXD (Tip)
4	TXD (Ring)	Transmit Data	Output
5	TXD (Tip)

Ethernet Interface

Ethernet Interface

Ethernet Type	Connector Type	Cable Type	Transmission Distance
AUI	15-pin DEC-Intel-Xerox (DIX) to external transceiver	RG-11 50-ohm coaxial	Trunk segment-1,640ft (500m) maximum Transceiver cable-164ft (50m) maximum Network trunk-8,200ft (2,500m) maximum
BNC	BNC T-adapter	RG-58 A/U 50-ohm coaxial	Trunk segment-984ft (300m) maximum Station distance-1.5ft (0.5m) maximum Network trunk-3,035ft (925m) maximum
RJ-48C	RJ-48C for 10BaseT	Category 5 unshielded twisted pair	Hub distance-328ft (100m) maximum Repeaters-four maximum