Document ID: 46796 | PDF Downloads
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FeedbackIntroduction
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
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 | NT3 | Polarity |
|---|---|---|---|
| 3 | Transmit | Receive | + |
| 4 | Receive | Transmit | + |
| 5 | Receive | Transmit | - |
| 6 | 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 |
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 | 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 limitation | 32.8' (10 m) | 32.8' (10 m) |
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
| Updated: Jul 07, 2005 | Document ID: 46796 |