This appendix describes the Cisco ME 4924-10GE switch ports and the cables and adapters that you use
to connect the switch to other devices.
Connector Specifications
These sections describe the connectors used with the switch.
Connecting to 1000BASE-T Devices
When connecting the ports to 1000BASE-T devices, such as servers, workstations, and routers, you must
use a four-twisted-pair, Category 5, straight-through cable wired for 10BASE-T, 100BASE-TX, and
1000BASE-T.
When connecting the ports to other devices, such as switches or repeaters, you must use a
four-twisted-pair, Category 5, crossover cable. Be sure to use a four-twisted-pair, Category 5 cable when
connecting to a 1000BASE-T-compatible device.
APPENDIX
B
NoteUse a straight-through cable to connect two ports only when one port is designated with an X. Use a
crossover cable to connect two ports when both ports are designated with an X or when both ports do
not have an X.
SFP Module Ports
The Cisco ME 4924-10GE switch uses SFP modules for fiber-optic and copper uplink ports. Refer to
the Cisco ME 4924-10GE switch release notes for a list of supported SFP modules.
Figure B-1Fiber-Optic LC Connector
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Cisco ME 4924-10GE Ethernet Switch Hardware Installation Guide
B-1
Connector Specifications
60915
23145678PinLabel
1
2
3
4
5
6
7
8
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-
Appendix B Connector and Cable Specifications
REVIEW DRAFT—CISCO CONFIDENTIAL
Warning
Console Port
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
beams or view directly with optical instruments.
Figure B-2Copper SFP Module RJ-45 Connector
The console port uses an 8-pin RJ-45 connector, which is described in Ta ble B-1 and Table B- 2 . An
RJ-45-to-DB-9 adapter cable is used to connect the console port of the switch to a console PC. You need
to provide a RJ-45-to-DB-25 female DTE adapter if you want to connect the switch console port to a
terminal. You can order a kit (part number ACS-DSBUASYN=) containing that adapter from Cisco.
NoteA console cable is not provided in the accessory kit. It can be ordered as an option.
Identifying a Crossover Cable
To identify a rollover cable, compare the two modular ends of the cable. Hold the cable ends
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.)
Figure B-3Identifying a Crossover Cable
B-2
Cisco ME 4924-10GE Ethernet Switch Hardware Installation Guide
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Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
These sections describe the cables and adapters used with the Cisco ME 4924-10GE switch.
Adapter Pinouts
Table B- 1 lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.
Table B-1Console Port Signaling Using a DB-9 Adapter
Switch
Console
Port (DTE)
SignalDB-9 PinSignal
RTS8CT S
DTR6DSR
TxD2RxD
GND5GND
GND5GND
RxD3TxD
DSR4DTR
CTS7RTS
RJ-45-to-DB-9
Terminal Adapter
Console
Device
Cable and Adapter Specifications
Table B- 2 lists the pinouts for the console port, RJ-45-to-DB-25 female DTE adapter, and the console
device.
NoteThe RJ-45-to-DB-25 female DTE adapter is not supplied with the switch. You can order a kit (part number
ACS-DSBUASYN=) containing this adapter from Cisco.
Table B-2Console Port Signaling Using a DB-25 Adapter
Switch
Console
Port (DTE)
SignalDB-25 PinSignal
RTS5CT S
DTR6DSR
TxD3RxD
GND7GND
GND7GND
RxD2TxD
RJ-45-to-DB-25
Terminal Adapter
Console
Device
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Cisco ME 4924-10GE Ethernet Switch Hardware Installation Guide
B-3
Console Port
Table B-2Console Port Signaling Using a DB-25 Adapter (continued)
Switch
Console
Port (DTE)
SignalDB-25 PinSignal
DSR20DTR
CTS4RTS
Console Port
The console port is an RJ-45 receptacle. The Request to Send (RTS) signal tracks the state of the Clear
to Send (CTS) input. Tab le B-3 lists the console port pinouts.
Table B-3Console Port Pinouts
PinSignalDirectionDescription
1RTSoutputrequest to send
2DTRoutputdata terminal ready
3TXDoutputtransmit data
4GND——
5GND——
6RXDinputreceive data
7DSRinputdata set ready
8CTSinputclear to send
Appendix B Connector and Cable Specifications
REVIEW DRAFT—CISCO CONFIDENTIAL
RJ-45-to-DB-25
Terminal Adapter
Console
Device
B-4
Cisco ME 4924-10GE Ethernet Switch Hardware Installation Guide
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