The following table provides the list of features available on supported devices.
|Feature||Polycom phones||Yealink phones||Cisco phones|
|Sync time with NTP service||Yes||Yes||Yes|
|Set custom admin password and language||Yes||Yes||Yes|
|Set custom time format and zone||Yes||Yes||Yes|
|TLS & SRTP||Yes||Yes||Yes|
|Zero-touch provisioning||Only on VVX series phones||Yes||No|
|Custom firmware required||Yes||No|
|Auto firmware upgrade||Yes||Yes||No|
|Hold / resume calls||Yes||Yes||Yes|
|Check voicemail (see note A)||Partial||Partial||Partial|
|Set up call forwarding||
|Set presence to Do Not Disturb
(see note B)
|Switch phone call to a Zoom Meeting||No||Partial
(see note C)
|Switch calls using phone line keys||No||No||No|
|Shared line appearance||No||No||No|
|Customer specific phone templates||No||No||No|
Note (A): Only supports retrieving new messages. You cannot save or listen to old messages and delete messages using a desk phone.
Note (B): Setting your status to Do Not Disturb on a desk phone will route all inbound call to your voicemail and prevent your desk phone from ringing. The Do Not Disturb status does not sync with the Zoom desktop client or mobile app.
Note (C): Certain Yealink phone models support an in-call Zoom softkey that can be used to switch to a Zoom meeting while on a call with another Zoom phone user. The following Yealink models support this feature: CP920, T21p, T23g, T27g, T40g, T42s, T46s, T48s, T53, T53w, T54w, T57w, W56p, W60p.