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Cisco 10000 Series Routers

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

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

Document ID: 46800

Updated: Jan 30, 2006

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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.

CAB-232MT.gif

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

CAB-232MTassembly.gif

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.

cab232fc.gif

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

Updated: Jan 30, 2006
Document ID: 46800