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Table of Contents
WIC−1B−S/T and WIC−1B−U WAN Interface Cards Cable Specifications................................................1
Document ID: 46796................................................................................................................................1
Introduction..........................................................................................................................................................1
Prerequisites.........................................................................................................................................................1
Requirements..........................................................................................................................................1
Components Used...................................................................................................................................1
Conventions............................................................................................................................................1
WIC−1B−S/T Interface Card...............................................................................................................................1
Cables......................................................................................................................................................2
ISDN BRI S/T Port Pinouts....................................................................................................................2
BRI S/T WAN Interface Card LEDs......................................................................................................2
WIC−1B−U WAN Interface Card.......................................................................................................................3
ISDN BRI U Port Pinouts (RJ−45).........................................................................................................3
ISDN BRI U WAN Interface Card LEDs...............................................................................................3
ISDN BRI Cable Specifications..............................................................................................................3
Related Information.............................................................................................................................................4
Cisco − WIC−1B−S/T and WIC−1B−U WAN Interface Cards Cable Specifications
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WIC−1B−S/T and WIC−1B−U WAN Interface Cards
Cable Specifications
Document ID: 46796
Introduction
Prerequisites
Requirements
Components Used
Conventions
WIC−1B−S/T Interface Card
Cables
ISDN BRI S/T Port Pinouts
BRI S/T WAN Interface Card LEDs
WIC−1B−U WAN Interface Card
ISDN BRI U Port Pinouts (RJ−45)
ISDN BRI U WAN Interface Card LEDs
ISDN BRI Cable Specifications
Related Information
Introduction
This document provides the technical specifications and cable requirements for the WIC−1B−S/T and
WIC−1B−U WAN interface cards.
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.
WIC−1B−S/T Interface Card
Cisco − WIC−1B−S/T and WIC−1B−U WAN Interface Cards Cable Specifications
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The Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) WAN interface cards are shared
between the Cisco 1600, 1720, 2600 and 3600 Series Routers. Each card supports a single ISDN BRI port
offered with and without the NT1 interface.
The S/T WAN interface card module (WIC−1B−S/T) needs the external Network Termination 1 (NT1) device
whereas the U WAN interface card module (WIC−1B−U) has an internal NT1 device.
Cables
The WIC−1B−S/T interface card requires RJ−45 to RJ−45 straight−through cables (provided by the
customer).
ISDN BRI S/T Port Pinouts
The table below shows the ISDN BRI S/T port pinouts (RJ−45).
8 Pin
1
TE
2
NT
3
Polarity
3
Transmit Receive +
4
Receive Transmit +
5
Receive Transmit −
6
Transmit Receive −
1
Pins 1, 2, 7, and 8 are not used.
2
TE refers to terminal terminating Layer 1 aspects of TE1, TA, and NT functional groups. This applies to the
Cisco 1603 and the ISDN BRI S/T WAN interface card.
3
NT refers to network terminating Layer 1 aspects of NT1 and NT2 functional groups. This applies to the
Cisco 1604 ISDN S/T port.
BRI S/T WAN Interface Card LEDs
The table below lists the BRI S/T WAN interface card LEDs and their meaning.
LED
Meaning
B1
Active connection on B1 channel
B2
Active connection on B2 channel
OK ISDN port has established a connection with the central
office switch
Cisco − WIC−1B−S/T and WIC−1B−U WAN Interface Cards Cable Specifications
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WIC−1B−U WAN Interface Card
ISDN BRI U Port Pinouts (RJ−45)
The table below lists the ISDN BRI U port pinouts and their function.
8 Pin
1
Function
3
No connection
4
Signal −− Tip or Ring
5
Signal −− Tip or Ring
6
No connection
1
Pins 1, 2, 7, and 8 are not used.
ISDN BRI U WAN Interface Card LEDs
The table below lists the ISDN BRI U WAN interface card LEDs and their meaning.
LED
Meaning
B1
Active connection on B1 channel
B2
Active connection on B2 channel
NT1 NT1 has established a connection with the central office
switch
ISDN BRI Cable Specifications
The table below lists the ISDN BRI cable specifications.
Specification High−capacitance
Cable
Low−Capacitance
Cable
Resistance (at 96
kHz)
160 ohms/km 160 ohms/km
Capacitance (at 1
kHz)
120 nF1/km 30 nF/km
Impedance (96
kHz)
75 ohms 150 ohms
Wire diameter
0.024" (0.6 mm) 0.024" (0.6 mm)
Distance 32.8' (10 m) 32.8' (10 m)
Cisco − WIC−1B−S/T and WIC−1B−U WAN Interface Cards Cable Specifications
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limitation
1
nF = nanoFarad
Related Information
Understanding the 1−Port ISDN BRI (S/T) WAN Interface Card (WIC−1B−S/T or
WIC36−1B−S/T)
•
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Updated: Jun 27, 2005 Document ID: 46796
Cisco − WIC−1B−S/T and WIC−1B−U WAN Interface Cards Cable Specifications
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