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.cisco WIC-1B-S-T-V3 V01思科原装线卡模块

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) cisco WIC-1B-S-T-V3 V01思科原装线卡模块 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)