Cisco Systems WIC-1B-S/T 사용자 설명서

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.

The WIC−1B−S/T interface card requires RJ−45 to RJ−45 straight−through cables (provided by the
customer).

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.

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