RJ9 Jumper Codes

Standard RJ9 (4P4C) Telephone Jumper Cable A reliable replacement cable for traditional corded desk phones and headsets.

• Connector Type: RJ9 / RJ10 / RJ22 (4-Pin, 4-Conductor)
• Configuration: Straight-through wiring (ideal for patch applications)
• Compatibility: Works with most major brands like Cisco, Avaya, Polycom, and Yealink.
• Build: Flexible PVC jacket with molded strain relief.

Which Plug is Witch?

• RJ9 (4P4C): Smallest. Used for the Handset (the part you hold).
• RJ11 (6P4C): Medium. Used for the Wall Line to the phone.
• RJ45 (8P8C): Largest. Used for Ethernet/Internet.