Cisco

Cisco SM25-T1 | T1 DSU/CSU interface, fractional/full 1.544 G.703, AMI/B8ZS, SF/ESF, RJ-48C, for 2500-series

SKU:SM25-T1

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Description

Provide fractional or full T1 WAN connectivity on supported 2500-series routers with an integrated DSU/CSU interface. This module supports industry-standard framing and line coding, Nx64 kbps timeslot allocation, and common diagnostics such as local/remote loopbacks for streamlined turn-up and troubleshooting. Ideal for legacy T1 circuits in branch or lab environments needing stable, standards-based WAN access.

Features

- Integrated DSU/CSU simplifies T1 deployments
- Supports both fractional and full T1 circuits
- Standards-compliant framing and line coding
- Robust diagnostics for quick turn-up and troubleshooting
- Ideal for lab, legacy, and branch connectivity

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

Technical Specifications

- Interface type: T1 CSU/DSU (RJ-48C, 100 Ω)
- Line rate: 1.544 Mbps (full T1) with fractional Nx64 kbps support
- Framing: SF (D4) or ESF selectable
- Line coding: AMI or B8ZS
- Timeslotting: 1–24 DS0s configurable
- Clocking: line or internal
- Diagnostics: local/remote loopback, performance monitoring
- Compatibility: selected 2500-series platforms (e.g., 2524/2525)

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