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Cisco 10000 Series Routers

CAB-449 MT and CAB-449 FC EIA/TIA-449 Serial Cable Specifications

Cisco - CAB-449MT and CAB-449FC EIA/TIA-449 Serial Cable Specifications

Document ID: 46801

Updated: Jan 30, 2006

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Introduction

This document provides the technical and cable specifications for the EIA/TIA-449 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-449 Speed and Distance Limitations

The use of balanced drivers allows EIA/TIA-449 signals to travel greater distances than the EIA/TIA-232 standard. The table below lists the standard relationship between baud rate and maximum distance for EIA/TIA-449 signals. These limits are also valid for V.35 and X.21.

Data Rate (Baud) Distance (Feet) Distance (Meters)
2400 4,100 1,250
4800 2,050 625
9600 1,025 312
19200 513 156
38400 256 78
56000 102 31
T1 50 15

caution Caution: The EIA/TIA-449 and V.35 interfaces support data rates up to 2.048 Mbps. Exceeding this maximum could result in loss of data and is not recommended.

Serial Cable CAB-449MT

This section presents the cable assembly and pinouts for the CAB-449MT 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.

cab449mt.gif

The cable gender for this product (part number 72-0795-01) is Male DB-60 to Male DB-37, mode - DTE.

The CAB-449MT 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-37 connector on the network end.

EIA/TIA-449 Serial Cable Assembly

eia449.gif

EIA/TIA-449 DTE Cable Pinouts

The table below shows the EIA/TIA-449 DTE cable pinouts (DB-60 to DB-37).

Note: The arrows indicate signal direction:

  • ---> indicates DTE to DCE

  • <--- indicates DCE to DTE

60 Pin1 Signal Description Direction 25 Pin Signal
J1-49 J1-48 MODE_1 GND Shorting group - - -
J1-51 J1-52 GND MODE_DCE Shorting group - - -
J1-46 Shield_GND Single - J2-1 Shield GND
J1-11 J1-12 TxD/RxD+ TxD/RxD- Twisted pair no. 6 ---> ---> J2-4 J2-22 SD+ SD-
J1-24 J1-23 TxC/RxC+ TxC/RxC- Twisted pair no. 9 <--- <--- J2-5 J2-23 ST+ ST-
J1-28 J1-27 RxD/TxD+ RxD/TxD- Twisted pair no. 11 <--- <--- J2-6 J2-24 RD+ RD-
J1-9 J1-10 RTS/CTS+ RTS/CTS- Twisted pair no. 5 ---> ---> J2-7 J2-25 RS+ RS-
J1-26 J1-25 RxC/TxCE+ RxC/TxCE- Twisted pair no. 10 <--- <--- J2-8 J2-26 RT+ RT-
J1-1 J1-2 CTS/RTS+ CTS/RTS- Twisted pair no. 1 <--- <--- J2-9 J2-27 CS+ CS-
J1-44 J1-45 LL/DCD Circuit_GND Twisted pair no. 12 ---> - J2-10 J2-37 LL SC
J1-3 J1-4 DSR/DTR+ DSR/DTR- Twisted pair no. 2 <--- <--- J2-11 J2-29 DM+ DM-
J1-7 J1-8 DTR/DSR+ DTR/DSR- Twisted pair no. 4 ---> ---> J2-12 J2-30 TR+ TR-
J1-5 J1-6 DCD/DCD+ DCD/DCD- Twisted pair no. 3 <--- <--- J2-13 J2-31 RR+ RR-
J1-13 J1-14 TxCE/TxC+ TxCE/TxC- Twisted pair no. 7 ---> ---> J2-17 J2-35 TT+ TT-
J1-15 J1-16 Circuit_GND Circuit_GND Twisted pair no. 9 - - J2-19 J2-20 SG RC

1Any pin not referenced is not connected.

Serial Cable CAB-449FC

This section presents the cable assembly and pinouts for the CAB-449FC serial cable.

The cable gender for this product (part number 72-0796-01) is Male DB-60 to Female DB-37, mode - DCE.

cab449fc.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-37 connector on the network end.

EIA/TIA-449 DCE Cable Pinouts (DB-60 to DB-37)

The table below shows the EIA/TIA-449 DCE cable pinouts (DB-60 to DB-37).

Note: The arrows indicate signal direction:

  • ---> indicates DTE to DCE

  • <--- indicates DCE to DTE

60 Pin1 Signal Description Direction 25 Pin Signal
J1-49 J1-48 MODE_1 GND Shorting group - - -
J1-46 Shield_GND Single - J2-1 Shield GND
J1-28 J1-27 RxD/TxD+ RxD/TxD- Twisted pair no. 11 <--- <--- J2-4 J2-22 SD+ SD-
J1-13 J1-14 TxCE/TxC+ TxCE/TxC- Twisted pair no. 7 ---> ---> J2-5 J2-23 ST+ ST-
J1-11 J1-12 TxD/RxD+ TxD/RxD- Twisted pair no. 6 ---> ---> J2-6 J2-24 RD+ RD-
J1-1 J1-2 CTS/RTS+ CTS/RTS- Twisted pair no. 1 <--- <--- J2-7 J2-25 RS+ RS-
J1-24 J1-23 TxC/RxC+ TxC/RxC- Twisted pair no. 9 ---> ---> J2-8 J2-26 RT+ RT-
J1-9 J1-10 RTS/CTS+ RTS/CTS- Twisted pair no. 5 ---> ---> J2-9 J2-27 CS+ CS-
J1-29 J1-30 NIL/LL Circuit_GND Twisted pair no. 12 ---> - J2-10 J2-37 LL SC
J1-7 J1-8 DTR/DSR+ DTR/DSR- Twisted pair no. 4 ---> ---> J2-11 J2-29 DM+ DM-
J1-3 J1-4 DSR/DTR+ DSR/DTR- Twisted pair no. 2 <--- <--- J2-12 J2-30 TR+ TR-
J1-5 J1-6 DCD/DCD+ DCD/DCD- Twisted pair no. 3 ---> ---> J2-13 J2-31 RR+ RR-
J1-26 J1-25 RxC/TxCE+ RxC/TxCE- Twisted pair no. 10 <--- <--- J2-17 J2-35 TT+ TT-
J1-15 J1-16 Circuit_GND Circuit_GND Twisted pair no. 8 - - J2-19 J2-20 SG RC

Related Information

Updated: Jan 30, 2006
Document ID: 46801