The Plantronics APC-42 Electronic Hookswitch (EHS) cable for Cisco IP Phones (Savi & CS500 series) - This special cable communicates electronically with your compatible phone in order to eliminate the need for an HL10 lifter.
NOTE! APC-42 is the same as previous APC-41, except it's now compatible with Cisco 6945
Only compatible with these Plantronics Savi and CS500 models:
- Plantronics CS540, CS510, CS520
- Plantronics Savi WO100, WO200, WO300 & WO350
- Plantronics Savi W740, W710, W720, W730, W745
This EHS Cable will ONLY work with the following Cisco IP phone models:
- 6945, 7821, 7841, 7861, 7942G, 7945G, 7962G, 7965G, 7975G, 8961, 9951, 9971
*Please Note: If you have Cisco IP 8961 9951 9971, you will need to use the APU-70 EHS version instead.
Your Phone's Software requirements:
The Cisco server must be running Cisco CallManager System Version 4.1(3)SR5x or higher. The Cisco phone must be running firmware 8.3(3)x or higher. To locate the firmware version, press the Settings button on the phone (the checkbox icon). Select “Model information”. The firmware revision is listed under “Load File.”
If your Cisco IP phone is equipped with a 7914 or 7915 expansion module/sidecar:
Plug the expansion module into the telephone AUX connector.
Connect the APC-4 / APC-40 control connection into the expansion module.
Use a 85638-01 adapter to extend the APC-4/APC40 audio input to reach the headset jack on the phone.