Cisco Systems EIA-TIA-232 Serial Cable CAB-232MT User Manual

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CAB−232MT and CAB−232FC EIA/TIA−232 Serial

Cable Specifications

Document ID: 46800

Introduction

Prerequisites

Requirements

Components Used

Conventions

EIA/TIA−232 Speed and Distance Limitations

Serial Cable CAB−232MT

EIA/TIA−232 Serial Cable Assembly

EIA/TIA−232 DTE Cable Pinouts

Serial Cable CAB−232FC

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

Related Information

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

MODE_0

Shorting

 

 

group

 

 

 

 

 

 

 

 

 

no. 6

J1−51

GND

 

 

 

 

J1−52

MODE_DCE

 

 

 

 

 

 

 

 

 

 

J1−46

Shield GND

Single

J2−1

Shield

 

GND

 

 

 

 

 

 

 

 

 

 

 

J1−41

 

 

 

 

 

Shield

TxD/RxD

Twisted pair

−−−>

J2−2

TxD

 

 

 

 

 

 

J1−36

no. 5

Shield

 

Shield

RxD/TxD

Twisted pair

<−−−

J2−3

RxD

 

 

 

 

 

 

J1−42

no. 9

Shield

 

Shield

RTS/CTS

Twisted pair

−−−>

J2−4

RTS

 

 

 

 

 

 

J1−35

no. 4

Shield

 

Shield

CTS/RTS

Twisted pair

<−−−

J2−5

CTS

 

 

 

 

 

 

J1−34

no. 10

Shield

 

Shield

DSR/DTR

Twisted pair

<−−−

J2−6

DSR

 

 

 

 

 

 

J1−45

no. 11

Shield

 

 

Circuit GND

 

J2−7

Circuit

Shield

Twisted pair

GND

 

no. 1

Shield

 

J1−33

 

 

 

 

 

 

 

 

 

 

Shield

DCD/LL

Twisted pair

<−−−

J2−8

DCD

 

 

 

 

 

 

J1−37

no. 12

Shield

 

Shield

TxC/NIL

Twisted pair

<−−−

J2−15

TxC

 

 

 

 

 

 

J1−38

no. 8

Shield

 

Shield

RxC/TxCE

Twisted pair

<−−−

J2−17

RxC

 

 

 

 

 

 

J1−44

no. 7

Shield

 

Shield

LL/DCD

Twisted pair

−−−>

J2−18

LTST

 

 

 

 

 

 

J1−43

no. 2

Shield

 

Shield

DTR/DSR

Twisted pair

−−−>

J2−20

DTR

 

 

 

 

 

 

J1−39

no. 3

Shield

 

Shield

TxCE/TxC

Twisted pair

−−−>

J2−24

TxCE

 

 

 

 

 

 

Shield −

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

Shorting

 

 

 

 

 

 

 

J1−46

GNDShield

group

 

 

Shield

Single

J2−1

 

GND

GND

 

 

 

 

 

 

 

 

 

 

J1−36

 

 

 

 

 

Shield

RxD/TxD

Twisted pair

<−−−

J2−2

TxD

 

 

 

 

 

 

J1−41

no. 9

Shield

 

Shield

TxD/RxD

Twisted pair

−−−>

J2−3

RxD

 

 

 

 

 

 

J1−35

no. 5

Shield

 

Shield

CTS/RTS

Twisted pair

<−−−

J2−4

RTS

 

 

 

 

 

 

J1−42

no. 10

Shield

 

Shield

RTS/CTS

Twisted pair

−−−>

J2−5

CTS

 

 

 

 

 

 

J1−43

no. 4

Shield

 

Shield

DTR/DSR

Twisted pair

−−−>

J2−6

DSR

 

 

 

 

 

 

J1−45

no. 3

Shield

 

 

Circuit

 

J2−7

 

Shield

GND

Twisted pair

Circuit

 

 

 

 

no. 1

Shield

GND

J1−44

 

−−−>

J2−8

DCD

LL/DCD

 

 

 

 

 

 

 

Shield

Twisted pair

Shield

 

 

 

no. 2

 

 

 

 

 

 

 

 

 

 

 

J1−39

 

 

 

 

 

 

Shield

TxCE/TxC

Twisted pair

−−−>

J2−15

TxC

 

 

 

 

 

 

 

 

J1−40

no. 7

Shield

 

 

 

Shield

NIL/RxC

Twisted pair

−−−>

J2−17

RxC

 

 

 

 

 

 

 

 

J1−33

no. 6

Shield

 

 

 

Shield

DCD/LL

Twisted pair

<−−−

J2−18

LTST

 

 

 

 

 

 

 

 

J1−34

no. 12

Shield

 

 

 

Shield

DSR/DTR

Twisted pair

<−−−

J2−20

DTR

 

 

 

 

 

 

 

 

J1−38

no. 11

Shield

 

 

 

Shield

RxC/TxCE

Twisted pair

<−−−

J2−24

TxCE

 

 

 

 

 

 

 

 

 

no. 8

Shield

 

 

 

 

Related Information

Technical Support − Cisco Systems

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Updated: Jan 30, 2006

Document ID: 46800