Cisco

Cisco CAB-X21-SSC-LFHT | Smart Serial to X.21 (DB15) Cable | DCE-to-DTE | Serial/Console

SKU:CAB-X21-SSC-LFHT

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Description

Reliable interconnect for bridging Smart Serial and X.21 (DB15) interfaces in WAN and legacy serial deployments. Wired for DCE at the X.21 side to mate with DTE equipment on the Smart Serial side. Shielded construction helps maintain signal integrity in electrically noisy racks.

Features

- DCE-to-DTE pinout for X.21 ↔ Smart Serial connectivity
- Shielded construction to reduce EMI and crosstalk
- Durable molded connectors with strain relief
- Secure fastening on DB-15 side for stable rack installs
- Engineered for reliable WAN serial operation

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 this cable wired as DCE or DTE?
A: It is wired for DCE on the X.21 (DB15) side to connect to a DTE device on the Smart Serial side.

Q: Can this be used as a console cable?
A: No. Console/management typically uses RS-232; this cable is for X.21 balanced serial (V.11) links.

Q: What data rates are supported?
A: Suitable for typical X.21/V.11 applications (e.g., E1/T1 rate links). Actual throughput depends on the connected equipment.

Q: What devices is it compatible with?
A: Any serial interfaces that present a Smart Serial port on one end and an X.21 (DB15) port on the other. Verify your port types before ordering.

Technical Specifications

- Interface: X.21 (V.11 balanced) to Smart Serial
- Connectors: DB-15 (X.21) and 26-pin Smart Serial
- Wiring role: X.21 side DCE to Smart Serial side DTE
- Use cases: WAN serial, CSU/DSU, legacy telco interconnects
- Signal support: Balanced V.11 differential signaling
- Construction: Shielded cable with molded backshells and strain relief
- Fastening: Thumbscrews/retention on D-sub side for secure fit

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