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CAB−449MT and CAB−449FC EIA/TIA−449 Serial
Cable Specifications
Document ID: 46801
Introduction
Prerequisites
Requirements
Components Used
Conventions
EIA/TIA−449 Speed and Distance Limitations
Serial Cable CAB−449MT
EIA/TIA−449 Serial Cable Assembly
EIA/TIA−449 DTE Cable Pinouts
Serial Cable CAB−449FC
EIA/TIA−449 DCE Cable Pinouts (DB−60 to DB−37)
Related Information
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
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4800
2,050 625
9600
1,025 312
19200
513 156
38400
256 78
56000
102 31
T1
50 15
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.
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
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•
Signal Description Direction Signal
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60
Pin
1
25
Pin
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
J2−37LLSC
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
J2−20SGRC
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1
Any 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.
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
Pin
1
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−
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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
J2−37LLSC
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
J2−20SGRC
Related Information
Technical Support − Cisco Systems•
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Updated: Jan 30, 2006 Document ID: 46801
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