• Cisco HWIC-1B-U module with black silver circuit board and Ethernet port
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Cisco

Cisco HWIC-1B-U | ISDN BRI U WAN Interface Card, 1-Port, NT1 Integrated

HWIC-1B-U

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Description

This WAN interface card provides a single ISDN BRI U (2-wire) port with an integrated NT1, delivering 2x 64K B channels and a 16K D channel. It suits branch and remote-site deployments where ISDN connectivity is required for primary WAN access or dial backup. The integrated NT1 allows direct connection to the ISDN line without an external termination device.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Integrated NT1 removes the need for an external network termination device
- Supports ISDN BRI connectivity for WAN access or dial backup
- Single-port interface card for modular router expansion

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Interface: 1x ISDN BRI U (2-wire)
- Bearer channels: 2x 64 Kbps B channels
- Signalling channel: 16 Kbps D channel
- NT1: integrated
- Module type: WAN interface card

FAQs

Q: Does this card need an external NT1 device?
A: No. The NT1 is integrated into the card, so it connects directly to a 2-wire ISDN U-interface line.

Q: What is the total ISDN bandwidth available?
A: The BRI interface provides two 64 Kbps B channels plus a 16 Kbps D channel, for up to 128 Kbps of bearer capacity.

Q: What type of ISDN interface does this card use?
A: It uses an ISDN BRI U (2-wire) interface, which is the line-side interface used with an integrated NT1.

Q: What is a typical use for this card?
A: It is commonly used in branch routers for ISDN WAN connectivity, including dial backup for a primary link.

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