• Cisco CAB-X21FC X.21 DCE female serial cable with metal connectors
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Cisco

Cisco CAB-X21FC | X.21 DCE Female Serial Cable for Router WAN

CAB-X21FC

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Description

X.21 DCE female serial cable for connecting a router serial interface to external WAN equipment. The DCE end provides clocking for the link, making it suited to back-to-back lab connections and WAN interface deployments that require X.21 signalling.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- DCE termination provides clocking for the serial link
- X.21 interface standard for synchronous serial WAN connections
- Suited to router serial port to WAN equipment connections

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

FAQs

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Technical Specifications

- Interface standard: X.21
- Connector gender: Female
- Cable role: DCE (provides clocking)
- Application: Router serial WAN interface

FAQs

Q: What does the DCE end of this cable do?
A: The DCE end supplies the clocking signal for the serial link, so it is used on the side of the connection that provides timing.

Q: What interface standard does this cable use?
A: It is an X.21 serial cable with a female connector, intended for synchronous serial WAN connections.

Q: Can this cable be used for back-to-back router connections?
A: A DCE cable can supply clocking in back-to-back setups when paired with a compatible DTE cable on the other router.

Q: Is this cable suitable for Ethernet connections?
A: No. It is a serial WAN cable for X.21 interfaces and is not used for Ethernet or fibre links.

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