Poly M12 Cable Adapter 85638-01

Extend Electronic Hook Switch Cable Connections

The Poly M12 Cable Adapter (85638-01) is a modular adapter cable designed to extend compatible electronic hook switch (EHS) connections and support specific office telephone configurations. It can help connect a compatible headset EHS cable to a phone or expansion module when the original cable does not reach the required connection point.

Flexible Integration with Business Phone Systems

This accessory is used with selected Plantronics EHS cables and compatible headset systems. Depending on the configuration, it can support installations involving Cisco expansion modules and other supported telephone setups. Verify the required adapter and phone compatibility before ordering, as it is not a universal cable for every desk phone.

A Practical Replacement for Existing Setups

If your current adapter is missing or damaged, the 85638-01 provides a replacement option for compatible equipment. It is also listed under the newer part number 85S12AA in some product references, so checking the part number and intended application can help you choose the correct cable.

For more connection solutions, explore our Connectivity Accessories or browse the Headset Cables collection for additional compatible accessories.