Plantronics APP-51 Electronic Hook Switch Cord (38439-11)
Frequently Asked Questions (FAQ's)
What is the APP-51 EHS cable used for?
It enables remote call control (answer/end) between compatible Poly/Plantronics wireless headsets and Polycom desk phones. Which Poly/Plantronics headsets are compatible with the APP-51?
Compatible headsets include CS510, CS520, CS530, CS540, Savi W710, W720, W730, W740, W745, WO100, WO101, WO200, WO201, WO300/50. Which Polycom phone models work with the APP-51?
Compatible Polycom phones include SoundPoint IP 320, 321, 330, 331, 335, 430, 450, 550, 560, 650, 670, and VVX 300, 310, 400, 410, 500, 600, 1500. Does the APP-51 replace the need for a handset lifter?
Yes, it eliminates the need for a HL10 handset lifter. How do I set up the APP-51 cable?
Replace the normal Plantronics-to-phone interface cable with the APP-51, and set the phone to Analog/Plantronics mode. Is the APP-51 easy to install?
Yes, customers report that it's easy to set up and use. Does the APP-51 improve call quality?
Some users report better call quality and higher maximum volume. Are there any known quality issues with the APP-51?
Some customers have reported quality control issues and cable failures. Can the APP-51 be used with non-Polycom phones?
It is intended for Polycom phones but may work with other brands. Check compatibility before making a purchase. What's the difference between the APP-51 and a handset lifter?
The APP-51 is an electronic solution that does not involve physically elevating the handset. Is the APP-51 compatible with Sennheiser headsets?
No, it's designed for use with Poly/Plantronics headsets. Does the APP-51 have a port for a busy lamp?
Yes, it has a port for use with a busy lamp. Can the APP-51 be used with softphones?
It's designed for desk phones, not softphones. Is the APP-51 the same as the 38439-11?
Yes, 38439-11 is the part number for the APP-51 EHS cable. Does the APP-51 work with Cisco phones?
No, it is meant for Polycom phones. Cisco phones need a separate EHS cable. Can I use the APP-51 with a corded headset?
No, it is intended for use with compatible wireless headsets. Where can I purchase the APP-51 EHS cable?
It's accessible from a variety of internet merchants and cellular providers. What's the length of the APP-51 cable?
The exact length is not stated in the search results, but EHS cables are normally between 3 and 6 feet long. Does the APP-51 allow for ring alerts in the headset?
Yes, it allows ring alerts to sound in your headset. What's the difference between APP-51 and 38439-11?
There is no difference; 38439-11 is the part number for the APP-51 EHS cable