• Electronic Hookswitch Cable APS-11
• Communicates Electronically w/ the Phone
• Eliminates the Need for a HL10 Lifter
• Replaces APS-10 Cable
• Compatible With These Plantronics Headsets: 

CS55
CS70
CS510
CS520
CS530
CS540
MDA200
On-Line Indicator Savi W710
Savi W720
Savi W730
Savi W740
Savi W745
WO100
WO101
WO200
WO201
WO300
WO350

Works With Following Phone Systems:

Siemens:
Optipoint 410
OpenStage 40
Optipoint 420
OpenStage 60
Optipoint 500
OpenStage 80
Optipoint 600

Funwerk Deskphones
Auerswald Deskphones
Agfeo Deskphones
DeTeWe Deskphones Aastra:
6739i
6753i
6755i
6757i
6757i CT
Aastra 6771
Aastra 6773
Aastra 6775
Aastra 6773 IP
Aastra 6775 IP
Aastra 5370
Aastra 5380
Aastra 5370 IP
Aastra 5380 IP