CAB-232 MT/FC EIA/TIA-232 Serial Cable Specifications

Introduction

This document provides the technical specifications for the EIA/TIA-232 serial cables.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

For more information on document conventions, see the Cisco Technical Tips Conventions.

EIA/TIA-232 Speed and Distance Limitations

As with all signaling systems, EIA/TIA-232 signals can travel a limited distance at any given bit rate; generally, the slower the data rate, the greater the distance.

The table below gives the EIA/TIA-232 speed and distance limitations.

Data Rate (Baud)	Distance (Feet)	Distance (Meters)
2400	200	60
4800	100	30
9600	50	15
19200	50	15
38400	50	15
57600	25	7.6
115200	12	3.7

Serial Cable CAB-232MT

This section presents the cable assembly and pinouts for the CAB-232MT serial cable.

Note: The cable itself identifies the Cisco router as a data terminal equipment (DTE) or data communications equipment (DCE) device to other devices in the network; for this reason, it is important to select the correct product number from the table below.

The cable gender for this product (part number 72-0793-01) is Male - Male, mode - DTE.

The CAB-232MT cable is used in the Cisco 7000 family, Cisco 4000 series, Cisco 3600 series, Cisco 2500 series, Cisco 1600 series, Cisco access servers, and AccessPro PC cards. This cable has a male DB-60 connector on the Cisco end and a male DB-25 connector on the network end.

EIA/TIA-232 Serial Cable Assembly

EIA/TIA-232 DTE Cable Pinouts

The table below shows the EIA/TIA-232 DTE cable pinouts (DB-60 to DB-25).

Note: The arrows indicate signal direction:

• ---> indicates DTE to DCE

• <--- indicates DCE to DTE

60 Pin1	Signal	Description	Direction	25 Pin	Signal
J1-50 J1-51 J1-52	MODE_0 GND MODE_DCE	Shorting group	-	-	-
J1-46	Shield GND	Single	-	J2-1	Shield GND
J1-41 Shield	TxD/RxD -	Twisted pair no. 5	---> -	J2-2 Shield	TxD -
J1-36 Shield	RxD/TxD -	Twisted pair no. 9	<--- -	J2-3 Shield	RxD -
J1-42 Shield	RTS/CTS -	Twisted pair no. 4	---> -	J2-4 Shield	RTS -
J1-35 Shield	CTS/RTS -	Twisted pair no. 10	<--- -	J2-5 Shield	CTS -
J1-34 Shield	DSR/DTR -	Twisted pair no. 11	<--- -	J2-6 Shield	DSR -
J1-45 Shield	Circuit GND -	Twisted pair no. 1	- -	J2-7 Shield	Circuit GND -
J1-33 Shield	DCD/LL -	Twisted pair no. 12	<--- -	J2-8 Shield	DCD -
J1-37 Shield	TxC/NIL -	Twisted pair no. 8	<--- -	J2-15 Shield	TxC -
J1-38 Shield	RxC/TxCE -	Twisted pair no. 7	<--- -	J2-17 Shield	RxC -
J1-44 Shield	LL/DCD -	Twisted pair no. 2	---> -	J2-18 Shield	LTST -
J1-43 Shield	DTR/DSR -	Twisted pair no. 3	---> -	J2-20 Shield	DTR -
J1-39 Shield	TxCE/TxC -	Twisted pair no. 6	---> -	J2-24 Shield	TxCE -

¹Any pin not referenced is not connected.

Serial Cable CAB-232FC

This section presents the cable assembly and pinouts for the CAB-232FC serial cable.

The cable gender for this product (part number 72-0794-01) is Male DB-60 to Female DB-25, mode - DCE.

This cable is used in the following systems: the Cisco 7000 family, Cisco 4000 series, Cisco 3600 series, Cisco 2500 series, Cisco 1600 series, Cisco access servers, and AccessPro PC cards. This cable has a male DB-60 connector on the Cisco end and a female DB-25 connector on the network end.

EIA/TIA-232 DCE Cable Pinouts (DB-60 to DB-25)

The table below shows the EIA/TIA-232 DCE cable pinouts (DB-60 to DB-25).

Note: The arrows indicate signal direction:

• ---> indicates DTE to DCE

• <--- indicates DCE to DTE

60 Pin	Signal	Description	Direction	25 Pin	Signal
J1-50 J1-51	MODE_0 GND	Shorting group	-	-	-
J1-46	Shield GND	Single	-	J2-1	Shield GND
J1-36 Shield	RxD/TxD -	Twisted pair no. 9	<--- -	J2-2 Shield	TxD -
J1-41 Shield	TxD/RxD -	Twisted pair no. 5	---> -	J2-3 Shield	RxD -
J1-35 Shield	CTS/RTS -	Twisted pair no. 10	<--- -	J2-4 Shield	RTS -
J1-42 Shield	RTS/CTS -	Twisted pair no. 4	---> -	J2-5 Shield	CTS -
J1-43 Shield	DTR/DSR -	Twisted pair no. 3	---> -	J2-6 Shield	DSR -
J1-45 Shield	Circuit GND -	Twisted pair no. 1	- -	J2-7 Shield	Circuit GND
J1-44 Shield	LL/DCD -	Twisted pair no. 2	---> -	J2-8 Shield	DCD -
J1-39 Shield	TxCE/TxC -	Twisted pair no. 7	---> -	J2-15 Shield	TxC -
J1-40 Shield	NIL/RxC -	Twisted pair no. 6	---> -	J2-17 Shield	RxC -
J1-33 Shield	DCD/LL -	Twisted pair no. 12	<--- -	J2-18 Shield	LTST -
J1-34 Shield	DSR/DTR -	Twisted pair no. 11	<--- -	J2-20 Shield	DTR -
J1-38 Shield	RxC/TxCE -	Twisted pair no. 8	<--- -	J2-24 Shield	TxCE -

Related Information

• Cisco Cable Product Numbers, Part Numbers, and Descriptions
• Technical Support - Cisco Systems