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The following table provides the list of features available on supported devices.
| Feature | Polycom | Yealink | Cisco | AudioCodes |
| Sync time with NTP server | Yes | Yes | Yes | Yes |
| Set custom admin password and language | Yes | Yes | Yes | Yes |
| Set custom time format and zone | Yes | Yes | Yes | Yes |
| TLS and SRTP | Yes | Yes | Yes | Yes |
| 3-way calling | Yes | Yes | Yes | Yes |
| Zero touch provisioning | Only on VVX series phones | Yes | No | Yes |
| Assisted provisioning | Yes | Yes | Yes | Yes |
| Custom firmware required |
No |
Yes | No | No |
| Auto firmware upgrade | Yes | Yes | No | Yes |
| Hold / resume calls | Yes | Yes | Yes | Yes |
| Transfer calls | Yes | Yes | Yes | Yes |
| Check voicemail (see note A) | Partial | Partial | Partial | Partial |
| Set up call forwarding (see note B) | No | Partial | No | Partial |
| Set presence to Do Not Disturb (see note C) |
Partial | Partial | Partial | No |
| Elevate to Zoom meeting | No | No | No | No |
| Call flip (see note D) | Partial | Partial | No | No |
| Multiple line keys assigned to direct phone numbers | Yes | Yes | Yes | No |
| Call delegation and shared lines (see note E) |
Partial | Partial | No | No |
| Contacts directory sync | No | No | No | No |
| Provision templates (see note F) | Partial | Partial | Partial | No |
| Sync in-call status with Zoom Desktop Client and Mobile App | Yes | Yes | Yes | Yes |
Note (A): Only supports retrieving new messages. You cannot save or listen to old messages and delete messages using a desk phone.
Note (B): Call forwarding from desk phones only works if the forward-to number is an external PSTN number or a Zoom Phone user/extension that is in my same SIP zone.
Note (C): 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 (D): Call flip is not supported on these models.
- Polycom: OBi302, OBi508, SoundPoint 335, SoundPoint 550, SoundPoint 650, SoundStation 5000, SoundStation 6000, Trio 8500, Trio 8800
- Yealink: CP920, CP960, W56P, W60P
Note (E): The following phone models support shared line appearance. Models not on this list might support some call delegation features like making and receiving calls, but won’t show the status of shared lines.
- Polycom: VVX150, VVX250, VVX350, VVX450
- Yealink: T42S, T46S, T48S, T54, T56, T58, VP59
Note (F): Provision templates are supported on these models.
- AudioCodes: 420HD, 440HD, 445HD
- Polycom: All supported VVX and trio series phones.
- Yealink: T42S, T46S, T48S, T53, T53W, T54W, T56A, T57W, T58A, VP59
