APPENDIX
B
Connectors and Cables
This appendix provides connector and cable pinout information for the 100BaseTX and
console ports on the FastHub.
100BaseTX Ports
The 100BaseTX ports use standard RJ-45 connectors, as shown in Figure B-1. The pinouts
are listed in Table B-1.
100BaseTX Port Connector
Table B-1
100BaseTX Port Connector Pinouts
H9266
Figure B-1
Pin
Signal
1
RD+
2
RD-
3
TD+
4
NC
5
NC
6
TD-
7
NC
8
NC
Connectors and Cables B-1
100BaseTX Ports
Ports 1x through 16x have their transmit (TD) and receive (RD) pairs internally crossed.
When connecting these ports to another hub, switch, or router (unless you are connecting
to the uplink port on another FastHub or 100BaseT hub), ensure that you use a crossover
cable.
Port 16, which is to the right of port 16x, is the 100BaseTX uplink port. This uplink port is
not internally crossed. When connecting this port to another FastHub 100BaseTX port or
to the 100BaseTX port on another hub, switch, or router, ensure that you use a straightthrough cable. Remember that the port on the device to which you are connecting must be
an X port.
Straight-through and crossover cable schematics are shown in Figure B-2.
Figure B-2
Hub
Straight-Through and Crossover Cable Schematics
Adapter
Hub
Hub
3 RD+
3 TD+
3 TD+
6 TD-
6 RD-
6 TD-
6 TD-
1 RD+
1 TD+
1 RD+
1 RD+
2 RD-
2 TD-
2 RD-
2 RDH5462
3 TD+
Straight-Through
B-2 FastHub 216T Installation and Configuration Guide
Crossover
Console Port
Console Port
The supplied RJ-45-to-RJ-45 rollover cable and adapters are used to connect the console
port of the FastHub to a terminal or modem. The following sections describe the rollover
cable and adapters for the console port.
Identifying a Rollover Cable
You can identify a rollover cable by comparing the two modular ends of the cable. When
holding the cables side-by-side, with the tab at the back, the wire connected to the pin on
the outside of the left plug should be the same color as the wire connected to the pin on the
outside of the right plug (see Figure B-3). If your cable came from Cisco Systems, pin 1 is
white on one connector, and pin 8 is white on the other (a rollover cable reverses pins 1 and
8, 2 and 7, 3 and 6, and 4 and 5).
Figure B-3
Identifying a Rollover Cable
Pin 1 on one connector and
pin 8 on the other connector
should be the same color.
Pin 8
H10632
Pin 1
Connectors and Cables B-3
Console Port
Connecting to a PC
Use the thin, flat, RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female DTE adapter
(labeled “TERMINAL”) to connect the console port to a PC running terminal emulation
software. Figure B-4 shows how to connect the console port to a PC. Table B-2 lists the
pinouts for the console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-9
female DTE adapter (labeled “TERMINAL”).
Connecting the Console Port to a PC
PC
RJ-45-to-RJ-45
rollover cable
FastHub 216T
RJ-45-to-DB-9 adapter
(labeled “TERMINAL”)
Table B-2
H10138
Figure B-4
Console Port Signaling and Cabling Using a DB-9 Adapter
Console
Port (DTE)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-9
Terminal Adapter
Console
Device
Signal
RJ-45 Pin
RJ-45 Pin
DB-9 Pin
Signal
RTS
11
8
8
CTS
DTR
2
7
6
DSR
TxD
3
6
2
RxD
GND
4
5
5
GND
GND
5
4
5
GND
RxD
6
3
3
TxD
DSR
7
2
4
DTR
CTS
81
1
7
RTS
1. Pin 1 is connected (inside the terminal adapter) to Pin 8.
B-4 FastHub 216T Installation and Configuration Guide
Console Port
Connecting to a Terminal
Use the thin, flat, RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-25 female DTE adapter
(labeled “TERMINAL”) to connect the console port to a terminal. Figure B-5 shows how
to connect the console port to a terminal. Table B-3 lists the pinouts for the console port,
the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 female DTE adapter (labeled
“TERMINAL”).
Connecting the Console Port to a Terminal
Terminal
RJ-45-to-RJ-45
rollover cable
FastHub 216T
H10137
Figure B-5
RJ-45-to-DB-25 adapter
(labeled “TERMINAL”)
Table B-3
Console Port Signaling and Cabling Using a DB-25 Adapter
Console
Port (DTE)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-25
Terminal Adapter
Console
Device
Signal
RJ-45 Pin
RJ-45 Pin
DB-25 Pin
Signal
RTS
11
8
5
CTS
DTR
2
7
6
DSR
TxD
3
6
3
RxD
GND
4
5
7
GND
GND
5
4
7
GND
RxD
6
3
2
TxD
DSR
7
2
20
DTR
CTS
81
1
4
RTS
1. Pin 1 is connected (inside the terminal adapter) to Pin 8.
Connectors and Cables B-5
Console Port
Connecting to a Modem
Use the thin, flat, RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-25 male DCE adapter
(labeled “MODEM”) to connect the console port to a modem. Figure B-6 shows how to
connect the console port to a modem. Table B-4 lists the pinouts for the console port, the
RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 male DCE adapter (labeled
“MODEM”).
Connecting the Console Port to a Modem
RJ-45-to-RJ-45
rollover cable
FastHub 216T
Modem
RJ-45-to-DB-25 adapter
(labeled “MODEM”)
Table B-4
H10139
Figure B-6
Console Port Signaling and Cabling Using a DB-25 Adapter
Console
Port (DTE)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-25
Modem Adapter
Modem
Signal
RJ-45 Pin
RJ-45 Pin
DB-25 Pin
Signal
RTS
11
8
4
RTS
DTR
2
7
20
DTR
TxD
3
6
3
TxD
GND
4
5
7
GND
GND
5
4
7
GND
RxD
6
3
2
RxD
DSR
7
2
8
DCD
CTS
81
1
5
CTS
1. Pin 1 is connected internally to Pin 8. (inside the terminal adapter)
B-6 FastHub 216T Installation and Configuration Guide