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Cisco

Cisco HWIC-ADSL-B-ST | ADSL over POTS + ISDN BRI S/T HWIC, 1x ADSL2/2+ (Annex A RJ-11) + 1x BRI (RJ-48C), 24/1.4 Mbps, IOS 12.4(20)T+

HWIC-ADSL-B-ST

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Description

Dual-port WAN HWIC that combines an ADSL over POTS interface with an ISDN BRI S/T port for backup or voice/data integration. Delivers ADSL2/2+ performance on Annex A lines while enabling dial or backup connectivity over the BRI S/T port. Ideal for branches needing resilient DSL access with ISDN fallback on the same module.

Features

- Combined ADSL Annex A and ISDN BRI S/T on a single HWIC
- Resilient WAN with ISDN dial-backup options
- ADSL2/2+ support for higher downstream throughput
- Flexible PPPoE/PPPoA and bridged encapsulations
- ATM QoS and multiple PVC support

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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FAQs

Technical Specifications

FAQs

Q: Is the BRI interface S/T or U?
A: It is an S/T (TE) interface; if your telco presents a U interface, an external NT1 is required.

Q: Can the BRI be used simultaneously with ADSL?
A: Yes, it can be configured for dial-backup, out-of-band, or other ISDN services alongside ADSL.

Q: Does this ADSL port support Annex M?
A: This variant targets Annex A over POTS; Annex M is not a primary feature of this model.

Q: Do I need microfilters on voice lines?
A: Follow provider guidance; POTS deployments typically use microfilters or a central splitter.

Q: What IOS is required?
A: Use Cisco IOS 12.4(20)T or 12.4(22)T and later for full feature support.

Technical Specifications

- Interfaces: 1x ADSL over POTS (Annex A), RJ-11; 1x ISDN BRI S/T (2B+D), RJ-48C
- DSL standards: ITU G.992.1 (ADSL), G.992.3 (ADSL2), G.992.5 (ADSL2+)
- Max ADSL data rates: up to 24 Mbps downstream, up to ~1.4 Mbps upstream (service dependent)
- ISDN BRI: S/T interface (TE), 2B+D, 144 kbps; supports backup/fallback connectivity
- Encapsulations: PPPoE, PPPoA, RFC 1483/2684 bridging
- ATM features: AAL5, multiple PVCs, OAM F4/F5
- Use cases: DSL primary with ISDN BRI dial-backup or out-of-band access
- Connectors: RJ-11 (ADSL), RJ-48C (BRI S/T); external splitters/NT1 as required
- Platform compatibility: ISR 1800/2800/3800 and ISR G2 1900/2900/3900 HWIC slots
- Software requirement: Cisco IOS 12.4(20)T or 12.4(22)T and later (feature-dependent)
- Management: CLI/SNMP with line and call diagnostics

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