Cisco Catalyst 3750 - Adapter Pinouts

B-9
Catalyst 3750 Switch Hardware Installation Guide
78-15136-03
Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
Note You can use the mdix auto interface configuration command in the CLI to enable
the automatic medium-dependent interface crossover (Auto-MDIX) feature.
When the Auto-MDIX feature is enabled, the switch detects the required cable
type for copper Ethernet connections and configures the interfaces accordingly.
Therefore, you can use either a crossover or a straight-through cable for
connections to a copper 10/100, 10/100/1000, or 1000BASE-T SFP module port
on the switch, regardless of the type of device on the other end of the connection.
The Auto-MDIX feature is enabled by default on switches running Cisco IOS
Release 12.2(18)SE or later. For releases between Cisco IOS
Release 12.1(14)EA1 and 12.2(18)SE, the Auto-MDIX feature is disabled by
default. For configuration information for this feature, refer to the switch software
configuration guide or the switch command reference.
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-1 Console Port Signaling Using a DB-9 Adapter
Switch
Console
Port (DTE)
RJ-45-to-DB-9
Terminal Adapter
Console
Device
Signal DB-9 Pin Signal
RTS 8 CTS
DTR 6 DSR
TxD 2 RxD
GND 5 GND
GND 5 GND
RxD 3 TxD
DSR 4 DTR
CTS 7 RTS