Polycom Telephones Require Handset Cradle Attachment (Plantronics #76141-01) Polycom Telephones Require Handset Cradle Attachment (Plantronics #76141-01) The handset cradle attachment is designed to work with an HL10 on Polycom phones that sit up at a steep angle with nothing to support the bottom of the handset receiver. When the HL10 lifter is activated the handset receiver will slide off to the side and … Continued