Polycom 501
Polycom 550
Polycom 650
Polycom 450
Polycom 320 / 321 / 330 / 331 / 335
Polycom 6000
Yealink SIP-T20P
Yealink SIP-T32G
Yealink SIP-T38G (color)
Yealink W52P
Aastra 9112i
Aastra 9133i
Aastra 480i / 35i
Aastra 480iCT / 35iCT - with cordless handset
Aastra 57i
Other Aastra phones
Click here, then click on 'Desk phones'
Grandstream phones
Grandstream Support for the GXP2000 - click here and look for the "Documentation" link at the top.