Cisco

Cisco HWIC-4T1-E1 | 4x T1/E1 Clear-Channel HWIC | RJ-48C | CSU/DSU | T1: 1.544M ESF/SF B8ZS/AMI | E1: 2.048M G.704 HDB3 | Unframed/Framed Data

SKU:HWIC-4T1-E1

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Description

Four-port T1/E1 clear-channel interface for high-throughput data backhaul over copper. Each port is independently selectable for T1 or E1 and supports unframed (clear-channel) or framed data transport with integrated CSU/DSU and RJ-48C connectivity. Designed for data aggregation, backhaul, and routing applications that do not require ISDN PRI.

Features

- Four-port T1/E1 clear-channel data transport
- Integrated CSU/DSU for simplified deployment
- Selectable T1 or E1 per port with framed/unframed options
- Standards-based coding and framing for interoperability
- RJ-48C copper interfaces for direct telco handoff

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: Does this module support ISDN PRI?
A: No. It is designed for clear-channel and framed data only.

Q: Can each port be set to T1 or E1?
A: Yes. Each of the four ports is independently selectable.

Q: Is a CSU/DSU integrated?
A: Yes. An onboard CSU/DSU per port handles line build-out and clocking.

Q: What applications is this best suited for?
A: High-speed data backhaul, WAN aggregation, and clear-channel transport where PRI signaling is not required.

Q: What cable type should I use?
A: RJ-48C twisted pair: 100Ω for T1 and 120Ω for E1. Use a 75Ω balun for coaxial E1 if needed.

Technical Specifications

- Ports: 4 x T1/E1, clear-channel (data)
- ISDN PRI: Not supported
- Per-port mode: Selectable T1 or E1
- Operational modes: Unframed clear-channel and framed data
- Line rate: T1 1.544 Mbps; E1 2.048 Mbps per port
- Framing: T1 ESF or SF (D4); E1 G.704
- Line coding: T1 AMI or B8ZS; E1 HDB3
- Connectors: 4 x RJ-48C; 100Ω (T1) / 120Ω (E1) UTP; 75Ω E1 via balun
- Integrated CSU/DSU with line/internal clocking
- Use cases: Data backhaul, WAN aggregation, clear-channel transport
- Alarm/status reporting via router IOS
- Form factor: HWIC (requires router with available HWIC slot)

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