Cisco − WIC−1B−S/T and WIC−1B−U WAN Interface Cards Cable Specifications
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
i
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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 Pin1
TE2
Transmit
Receive
Receive
Transmit
NT3
Receive
Polarity
3
4
5
6
+
+
−
−
Transmit
Transmit
Receive
1Pins 1, 2, 7, and 8 are not used.
2TE 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.
3NT 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 Pin1
Function
3
No connection
4
Signal −− Tip or Ring
5
Signal −− Tip or Ring
6
No connection
1Pins 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
120 nF1/km
75 ohms
160 ohms/km
30 nF/km
Capacitance (at 1
kHz)
Impedance (96
kHz)
150 ohms
Wire diameter
Distance
0.024" (0.6 mm)
32.8' (10 m)
0.024" (0.6 mm)
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)
• Technical Support − Cisco Systems
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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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