Cisco

Cisco CAB-X21FC | X.21 DCE female serial cable | WAN clocking | router interface lead

SKU:CAB-X21FC

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Description

Serial WAN cable with X.21 DCE female interface for connecting routers to X.21 DTE equipment. Provides clocking from the DCE side for stable synchronous links in lab or legacy leased-line environments. Ensure the router-side interface and module are compatible with this DCE variant before deployment.

Features

- Reliable synchronous serial connectivity for X.21 links
- DCE configuration for clocking-sensitive deployments
- Clearly labeled DCE end reduces setup errors
- Durable construction for network and lab use

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: X.21 (DCE, female)
- Role: Supplies DCE clocking to DTE for synchronous serial links
- Use case: Router-to-X.21 DTE/CSU-DSU connections
- Compatibility: Requires a compatible serial WAN interface module on the router
- Connector detail: X.21 DCE female on network side; router-end interface depends on module—verify prior to purchase
- Applications: Legacy leased lines, interoperability testing, lab environments
- Note: Not a console cable

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