Plantronics APV-66 Electronic Hook Switch 

• For use with AVAYA IP telephones operating either the Plantronics Savi W700 or the CS500 product series

• Enables remote Call Answer / Call End without the need for an HL10 lifter

• Includes Online Indicator Port

• Provides Remote Ring Detection (beeping in ear)

Compatible Avaya telephones include:

• 2420
• 4610
• 4610SW
• 4620
• 4620SW
• 4621SW
• 4622SW
• 4625SW
• 4630SW
• 5420
• 5610
• 5620
• 5621