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Plantronics Cisco Headset Hookswitch Control Adapter (APC-4) 37978-01

Plantronics Cisco Headset Hookswitch Control Adapter (APC-4) 37978-01
Item# 37978-01
Regular price: $79.95
Sale price: $54.99
Availability: Usually ships the same business day

Product Description

Seamlessly connect your Cisco Unified IP phone with all Plantronics Professional Wireless Headset Systems, including the Plantronics CS Wireless product family (CS50, CS55, CS70, CS70N, CS351N, CS361N) and the Plantronics Voyager 510S Professional Bluetooth Headset System. This eliminates the need for a an HL10 lifter.

The APC-4 enables the ability to answer and end calls from up to 300 feet away from your phone, freedom to move about the office and multi-task, connects with one simple step.

The APC-4 is compatible with the following Cisco Unified IP Phones: 7975G, 7965G, 7962G, 7945G and 7942G. The APC-4 Headset Hookswitch Control adapter will not work with Cisco IP phones 7940, 7941, 7960, 7961, 7970.

  • Cisco firmware needs to be version 8.3(3)x or above. Unified Communications Manager version 4.1(3)SR5x or above.
  • The Cisco APC-4 software functionality must first be enabled through the Cisco Unified Communications Manager administration application (default is “Disabled”). Contact your system administrator to enable this feature.
  • The Cisco Unified IP Phone Expansion Module requires the use of cable adapter, p/n 40287-05.

Q. How do I know if the hook switch control feature is enabled/disabled on my phone?

A. On the phone, you can verify that the feature is enabled by choosing the Settings button > scroll to Device Configuration > scroll to Media Configuration, and verifying that the Headset Hookswitch Control setting displays Enabled.

Click this link for Quick Start Guide which provides information for the installation and use of the Headset Hookswitch Control (HHC) adapter compatible with Cisco Unified IP Phone models 7975G, 7965G, 7945G, 7962G, and 7942G.

** Attention Cisco Expansion Module Users **

When using the Cisco Unified IP Phone Expansion Module the use of cable adapter, Plantronics Adapter 85638-01 is required.

Plantronics Adapter 85638-01 replaced 40287-05 in 2012.

Plug the expansion module into the telephone AUX port. Plug the APC-4/APC-40/APC-41 into the expansion module.

Use a Part Number 85638-01 (formerly 40287-05) adapter to extend the APC-4/APC-40/APC-41 audio input to reach the headset jack on the phone. is a Plantronics Authorized Partner and eCommerce Store.