The following table provides the list of features available on certified desk phones. This article does not apply to certified gateways and analog telephone adapters.

Zoom Phone supports secure voice calls for connections between the Zoom Cloud and the Zoom desktop client, mobile app, web browser/client, and supported SIP devices. During call setup, Zoom Phone uses SIP over TLS 1.2 with Advanced Encryption Standard (AES) 256-bit algorithm for these connections. The Zoom desktop client, mobile app, and web browser/client connections encrypt call media to the Zoom Cloud using SRTP with AES 256-bit encryption algorithm. SIP devices configured with SRTP use AES-128 or AES-256 bit algorithm to encrypt call media for connections to the Zoom Cloud, otherwise unencrypted RTP is used as a fallback. 

Important: By default, AES-128-bit encryption is enabled for call media transmitted by supported SIP devices. Admins can upgrade SIP devices to AES-256 bit encryption using the web portal. Fax lines may not support full encryption.

For supported features on Zoom clients/apps and Zoom Phone Appliances, see the Zoom Phone client features comparison article.

This article covers:

• Cloud Failover
• Comparison of supported desk phone features by brand
  
  • In-call controls
  • Additional features
  • Administration
• Notes for features with partial support
  
  • Admin password
  • Aim call park (park using line key)
  • Audio intercom
  • Assisted provisioning
  • Background image
  • Call control from Zoom desktop client
  • Call delegation and shared line groups
  • Call flip
  • Call forward settings with sync
  • Call park
  • Call monitoring (listen, whisper, barge, take over)
  • Call monitoring for call queues (listen, whisper, barge, take over)
  • Call monitoring for shared line appearance (listen, whisper, barge, take over)
  • Call monitoring for shared line groups (listen, whisper, barge, take over, conference barge)
  • Cloud paging
  • Companion mode
  • Company directory search
  • Conference call
  • Custom firmware required
  • Do not disturb (DND) status
  • Emergency services location reporting
  • Group call pickup
  • Hot desking
  • Local survivability
  • Message waiting indicator for SLG/SLA
  • Multiple Line Appearance
  • Multiple line keys
  • Multiple phone users
  • Privacy mode
  • Provision templates
  • Set up call forwarding
  • Screen lock
  • Speed dial and busy lamp field
  • Transfer to voicemail
  • Zero touch provisioning (ZTP)

Prerequisites for using supported desk phone features

• Provisioned desk phone assigned to a phone user

Note: If you have provisioned desk phone set up as a common area phone, some desk phone features will be limited.

Cloud Failover

Failover support allows Zoom Phone devices to register automatically to an alternate Zoom Phone data center when the primary data center becomes unavailable through planned or unplanned downtime. During the failover process, the devices may experience a brief service interruption and missed call notifications. Devices will initiate a failback process and return to the primary data center once the service is resumed.

The following devices support the failover process as described above. However, each device must be on the Supported Firmware listed per this page:

• AudioCodes:

  • 405HD, 445HD, 450HD, C450HD, RX50, MP1288, MediaPack MP504/508 (formally M500Li) (7.26A.356.075 or higher), MP112, MP114, MP118, MP124

• Cisco:
  Note: Singapore and Hong Kong locations not supported at this time.
  
  • 6800 series
  • 7800 series
  • 8800 series
• Grandstream: GRP2601, GRP2602, GRP2603, GRP2604, GRP2612, GRP2613, GRP2614, GRP2615, GRP2616, GRP2624, GRP2634, GRP2670
• Poly:
  
  • CCX400, CCX500, CCX505, CCX600, CCX700
  • Edge B10, Edge B20, Edge B30, Edge E100, Edge E220, Edge E300, Edge E320, Edge E350, Edge E400, Edge E450, Edge E500, Edge E550
  • OBi 300, 302, ATA 400, ATA 402
  • Rove B1, B2, B4
  • Trio 8500, Trio 8800, Trio C60
  • VVX 101, VVX 150, VVX 201, VVX 250, VVX 300, VVX 301, VVX 310, VVX 311, VVX 350, VVX 400, VVX 401, VVX 410, VVX 411, VVX 450, VVX 500, VVX 501, VVX 600, VVX 601, VVX D230 DECT
• Yealink:
  • CP920, CP925, CP960, CP965, CP935W
  • T21P, T23G, T27G, T29G, T31G, T31P, T31W, T33G, T34W, T40G, T42G, T42S, T43U, T44U, T44W, T46G, T46S, T46U, T48G, T48S, T48U, T53, T53W, T54W, T56A, T57W, T58A, T58W
  • VP59, W60P, W70B, W80DM, W90DM

Comparison of supported desk phone features by brand

The following table compares phone feature across certified models.

Legend:

• Model series name (for example, VVX): All models in the series support the feature, unless the table states (partial) after the series name.
• Partial: Only some models support the feature. Click the embedded link to view a list of supported models.
• Check mark icon (✔): All certified models for the brand are supported.

Feature	Poly	Yealink	Cisco	AudioCodes	Grandstream	Avaya
Basic calling features Make and receive calls View and delete voicemail Hold/resume calls Set outbound caller ID Note: You must set your outbound caller ID using keys and positions settings in the Zoom web portal. Do not set your outbound caller ID using the phone's interface. Transfer Start three-way call For Grandstream use the *86 DTMF code to access voicemail.	All certified AudioCodes, Avaya, Cisco, Grandstream, Poly, and Yealink models
Basic admin features Custom time format and zone Enable or disable phone web admin portal Sync time with NTP server TLS and SRTP	All certified AudioCodes, Avaya, Cisco, Grandstream, Poly, and Yealink models
In-call controls
Aim call park (park using line key)		Partial		445HD 450HD C450HD
Audio intercom	✔	✔		✔
Call control from Zoom desktop client	VVX (partial) Edge E	T2 T3 T4 T5 (partial) VP		445HD 450HD C450HD
Companion mode	VVX (partial) Edge E	CP (partial) T2 T3 T4 T5 VP		(pending confirmation)
Call flip (see note)	CCX DECT VVX Edge E	T2 T3 T4 T5 VP		445HD 450HD C450HD
Call forwarding Settings sync with client		T31G, T31P, T31W, T33G, T34W T43U, T46U, T48U T53, T53W, T54W, T57W, T58W VP59
Call monitoring (listen, whisper, barge, take over) - see note	VVX (partial) Edge E	CP (partial) T2 T3 T4 T5 VP		445HD 450HD C450HD
Call monitoring for call queues (listen, whisper, barge, take over)	CCX (pending confirmation) VVX(partial) Edge E	Partial		445HD 450HD C450HD
Call monitoring for shared line appearance (listen, whisper, barge, take over)	Edge E	Partial		445HD 450HD C450HD
Call monitoring for shared line groups (listen, whisper, barge, take over, conference barge)	VVX(partial) Edge E (conference barge only)	Partial		445HD 450HD C450HD
(see note)	CCX Edge B, E VVX	CP (partial) T2 T3 T4 T5 VP	✔	445HD 450HD C450HD RX50		✔
Sync in-call status with Zoom desktop client and mobile app	✔	✔	✔
Transfer to voicemail (see note)	✔	✔	with DTMF code	✔	with DTMF code
Additional features
Add local contacts to physical phone directory	✔
Background image	Partial	Partial	6871 8811 8841 8845 8851 8861 8865	(pending confirmation)
Call history for signed users	Partial	✔	✔
Company directory search (search phone users in the account) - see note	Edge B, E VVX CCX DECT Trio	✔	✔	✔	GRP2601 GRP2602 GRP2603 GRP2604
Conference call (see note)	Edge E	CP925 T331G/T31P T33G T43U T46U T48U T53/T53W T54W T57W VP59		C445HD C450HD
Cloud Paging (see note)	Edge E	T31P T31G T33G T43U T46U T48U T58W T53 T54 T57W		C450HD 450HD 445HD
DND (do not disturb) status (see note for limitations)	✔	✔	✔	✔	✔	✔
DND presence status sync	Edge E CCX400 CCX500 CCX505 CCX600 CCX700 VVX150 VVX250 VVX350 VVX450	T31G/T31P T33G T42S T43U T46S/T46U T48S/T48U T53/T53W T54W T56A T57W T58A T58W VP59		445HD 450HD C450HD RX50
Emergency services location reporting	VVX (partial) Edge B, E Trio C60 Trio 8500 Trio 8800	Partial		405HD 445HD C450HD
Group call pickup	VVX (partial) Edge E  CCX (pending confirmation)	Partial		445HD 450HD C450HD
Hot desking (see note)	✔	✔	✔	445HD 450HD C450HD		✔
Local survivability	VVX CCX Trio Edge E series	CP920 CP925 T31G T31P T33G T42S T43U T46S T48S T46U T48U T53 T53W T54W T57W T58W W60P W70B W80DM W90DM	6800 series 7800 series 8800 series	405HD 445HD 450HD C450HD RX50 MP-1xx MP-5xx MP-1288(*)
Message waiting indicator for SLG/SLA	✔	✔	✔	✔	✔
Multiple line keys assigned to direct phone numbers (see note)	✔	✔	✔	445HD 450HD C450HD	GRP260x GRP2612, GRP2613, GRP2614, GRP2615, GRP2616 GRP2624, GRP2634, GRP2670
Multiple Line Appearance	Edge E series (partial) VVX (partial)	T31G, T31P T33G T43U T46U T48U T53, T53W T54W T57W VP59		445HD 450HD C450HD RX50		J139 J159 J179
Opt in/out of Shared Line Groups from IP Phone	CCX (partial) VVX (partial) Edge E (partial)	CP (partial) T2 T3 T4 T5 VP		445HD 450HD C450HD
Privacy mode	VVX (partial) Poly Edge E	Partial		445HD 450HD C450HD
Set up call forwarding	✔	✔	✔	✔	✔
Screen lock (see note)	VVX CCX Edge E	CP T2 T3 T4 T5 VP
Shared directory of external contacts	✔	✔	✔	✔	260x
Shared lines (Call delegation and shared line groups)	CCX (partial) VVX (partial) Edge E (partial)	CP (partial) T2 T3 T4 T5 VP		445HD 450HD C450HD
Speed dial and busy lamp field	Trio (pending confirmation) VVX (partial) CCX Edge B, E	Partial	✔	Partial	GRP260x GRP2612 GRP2613 GRP2614 GRP2615 GRP2616 GRP2624 GRP2634 GRP2670	✔
Send and receive fax (see the notes for ATA limitations)	OBi30X OBi508			MP1288, MediaPack MP504/508 (formally M500Li) MP1XX	HT8XX ATA
Tap to Hot desk	Edge E
Administration
Assisted provisioning	✔	✔	✔	✔ (see note)	✔	✔ (see note)
Auto firmware upgrade	✔	✔	✔	✔	✔	✔
Custom admin password set in web portal and custom language	✔	✔	✔	Partial	(pending confirmation)
Custom firmware rule	✔	✔	✔	✔
Custom firmware required		✔		✔
Custom time format and zone	✔	✔	✔	✔	(pending confirmation)
Enable or disable phone web admin portal	✔	✔	✔	✔		✔
Multiple phone users per device (see note)	D230 ATAs ROVE B2, B4	W series	ATA191 ATA192	MP
Provision templates (see note)	✔	✔	✔	✔	✔	✔
Sync time with NTP server	✔	✔	✔	✔	✔	✔
TLS and SRTP	✔	✔	✔	✔	✔	✔
Zero touch provisioning	✔	✔	✔	Partial		✔

Notes for features with partial support

Admin password

The firmware requirements of AudioCodes 445HD, 450HD, C450HD to support admin password:

• 445HD, 450HD, C450HD: 3.4.6.565 or later versions

The Admin Password setting located in the account-level desk phone settings doesn't apply to these models:

• AudioCodes: MP112, MP114, MP118, MP124
• Algo SIP-based devices
• CyberData SIP-based devices

Aim call park (park using line key)

Aim call park (park using line key) is supported on these models:

• AudioCodes: 445HD, 450HD, C450HD
• Yealink: CP925, CP960, CP965, T27G, T31P, T31G, T33G, T43U, T46U, T42S, T46S, T48S, T53W, T54W, T56A, T57W, T58W, T58A, VP59

Audio intercom

Audio intercom is supported on these models:

• Poly: All certified models
• Yealink: All certified models
• AudioCodes: All certified models

Assisted provisioning

Algo: Assisted provisioning is available for Algo paging devices. As of the time of this release, certain devices such as model 8180 do not pass the assisted provisioning, therefore the model 8180 device may need to be manually provisioned as Other/Generic device while we are working on resolving the issue.

Avaya: Assisted provisioning is available for Avaya supported devices using the enrollment code. Avaya ZTP (Device Enrollment Services) server must be reachable from your network.

CyberData: Assisted provisioning is available for CyberData paging devices. However some older product lines are missing the necessary SSL device certificate support required for assisted provisioning (also known as auto-URL provisioning), therefore the older product lines may still need to be manually provisioned as Other/Generic devices. Please reach out to CyberData support for details. You can identify if a CyberData device supports assisted provisioning. 

Background image

The following phone models support background image.

• Cisco: 6871, 8811, 8841, 8845, 8851, 8865
• Poly:
  • CCX 400/500/600/700
  • VVX 250, VVX 311, VVX 350, VVX 410, VVX 450, VVX 501
  • Edge E100, E200, E300, E320, E400, E450, E500, E550
• Yealink: 
  • CP925, CP960, CP965
  • T33G, T46U, T48S, T48U, T48G, T57W, T58A, T58W
  • VP59

Cloud Paging

Cloud paging is supported on the following devices:

• AudioCodes: C450HD, 450HD, 445HD
• Poly: Edge E series
• Yealink: T53W, T54W, T57W, T58W, T43U, T46U, T48U, T31P, T31G, T33G

Call control from Zoom desktop client

Call control from Zoom desktop client is supported on these models:

• AudioCodes:
  • 445HD, 450HD, C450HD
• Poly:
  • VVX 101/150/201/250/301/311/350/401/411/450/501/601
  • Edge E100, E220, E300, E320, E350, E400, E450, E500, E550
• Yealink: T27G, T31P, T31G, T33G, T42S, T46S, T48S, T43U, T46U, T53, T53W, T54W, T57W, T58W, VP59

Call delegation and shared line groups

The following phone models support call delegation and shared line groups. Models not on this list might support some features like making and receiving calls using a shared line, but won’t show the status of shared lines.

• AudioCodes: 450HD, C450HD, 445HD
• Poly: Edge E series, CCX 400/500/600/700, VVX 150/250/350/450
• Yealink: All certified models except CP920, W56P, W60P, W80, W90

Call forwarding Setting sync with client

You can submit a request to Zoom Support to enable this feature for your account.

Call forwarding sync with the Zoom app is supported on these models:
Note: For users with multiple DIDs, enabling the Call forward settings sync with client feature, ensures incoming calls are forwarded. However, for non-primary lines, the forward indicator or destination number won't synchronize on the IP phone. This limitation will be addressed in an enhancement scheduled for early Q2 deployment.

• Yealink: 
  
  • T31G, T31P, T31W, T33G, T34W
  • T43U, T46U, T48U
  • T53, T53W, T54W, T57W, T58W
  • VP59

Call flip

Call flip is supported on these models:

• AudioCodes: 445HD, 450HD, C450HD
• Poly: All certified models except Edge B series, OBi302, OBi508, SoundPoint 335, SoundPoint 550, SoundPoint 650, SoundStation 5000, SoundStation 6000, Trio 8500, Trio 8800
• Yealink: All certified models except CP920, CP960, W56P, W60P, W80, W90

All other certified Poly and Yealink models support call flip.

Call history for signed users

• Cisco: All certified models
• Poly: Soundpoint series, Soundstation series, Trio series, CCX series, VVX series, Edge E series
• Yealink: All certified models

Call park

Call park is supported on these models:

• AudioCodes: 445HD, 450HD, C450HD
• Avaya: J100 series
• Cisco: All certified models
• Poly: All certified Edge B and E, CCX, and VVX series models except the following:
  • D230
• Yealink: T27G, T31P, T31G, T33G, T42S, T46S, T48S, T43U, T46U, T53, T53W, T54W, T57W, T56A, T58A, VP59, T58W

Call monitoring (listen, whisper, barge, take over)

Call monitoring is supported on these models:

• AudioCodes: 445HD, 450HD, C450HD
• Poly: All certified VVX and Edge E series models except Edge B series, VVX 101/150/201
• Yealink: All certified models except CP920, W56P, W60P, W80, W90

Call monitoring for call queues (listen, whisper, barge, take over)

Call monitoring for call queues is supported on these models:

• Yealink: T27G, T31P, T31G, T33G, T42S, T46S, T48S, T43U, T46U, T53, T53W, T54W, T57W, T56A, T58A, VP59, T58W
• Firmware requirements:
  • T27G (69.85.3.11 or later versions)
  • T31G, T31P, T33G (124.85.3.11 or later versions)
  • T42S, T46S, T48S (66.85.3.11 or later versions)
  • T43U, T46U (108.85.3.11 or later versions)
  • T53, T53W, T54W, T57W (96.85.3.12 or later versions)
  • T56A, T58A (58.85.3.8 or later versions)
  • VP59 (91.85.3.9 or later versions)
  • T58W (150.86.3.4 or later versions)

Call monitoring for shared line appearance (listen, whisper, barge, take over)

Call monitoring for shared line appearance (call delegation) is supported on these models:

• AudioCodes: 450HD, C450HD
• Yealink: T27G, T31P, T31G, T33G,  T42S, T43U, T46S, T48S, T46U, T53W, T54W, T56A, T57W, T58W, T58A, VP59

Call monitoring for shared line groups (listen, whisper, barge, take over, conference barge)

Call monitoring for shared line groups is supported on these models:

• AudioCodes: 450HD, C450HD
• Poly: Certified Edge E series
• Yealink: T43U, T46U, T42S, T46S, T48S, T27G, T31P, T31G, T33G, T53, T53W, T54W, T57W, T56A, T58A, VP59, T58W
• Firmware requirements:
  • T43U, T46U (108.85.3.15 or later version)
  • T42S, T46S, T48S (66.85.3.15 or later version)
  • T27G (69.85.3.15 or later version)
  • T31P, T31G, T33G (124.85.3.15 or later version)
  • T53, T53W, T54W, T57W (96.86.3.2 or later version)
  • T56A, T58A (58.85.3.14 or later version)
  • VP59 (91.85.3.13 or later version)
  • T58W (150.86.3.4 or later version)

Companion mode

Companion mode is supported on these models:

• Poly: VVX series models (except VVX 101, VVX 150, VVX D230), Edge E series
• Yealink: CP925, CP960, CP965, T27G, T31G, T31P, T33G, T43U, T46U, T48U, T42S, T46S, T48S, T53, T53W, T54W, T57W, T56A, T58A, T58W, VP59

Company directory search

Company directory search is supported on these models:

• AudioCodes: 450HD, C450HD, 445HD
• Cisco: All certified models
• Grandstream: GRP260 series
• Poly: All certified CCX, Edge B and E series, VVX, Rove, and Trio series models
  Note: The D230 DECT phone does not support company directory search.
• Yealink: All certified models

Notes:

• The Zoom Phone admin must re-sync desk phones for the contacts directory to appear. Alternatively, phone users can re-sync their desk phone by manually rebooting it.
• Refer to the quick start guides for Poly or Yealink if you need help using the company directory.
• If company directory search isn't working, make sure to open outbound port 390.

Conference call

Conference call for up to 10 participants with the associated firmware versions is supported on these models:

• AudioCodes: C450HD, C445, firmware 3.4.8.198.24
• Poly: Edge E100, Edge E220, Edge E300, Edge E320, Edge E350, Edge E400, Edge E450, Edge E500, Edge E550, firmware 8.1.2.1128
• Yealink:
  • CP925, firmware 148.86.3.10
  • T31G, T31P, T33G, firmware 124.86.3.3
  • T43U, T46U, T48U, firmware 108.86.3.2
  • T53, T53W, T54W, T57W, firmware 96.86.3.11
  • VP59, firmware 91.86.3.1

Custom firmware rules

A custom firmware that includes the vendor, model, and firmware version that can be applied in the firmware management of those devices.

Custom firmware required

Yealink phone models require a custom firmware that is built specifically for Zoom Phone, while certified IP phones from other manufacturers use the firmware that comes from those vendors and isn't specific to Zoom Phone.

Do not disturb (DND) status

The DND status only applies to the phone you set it on. 

Note: A physical or manual reboot of your desk phones is required after enabling the DND feature for the first time.

The DND status functions differently depending on the manufacturer:

• Poly: Sound notifications are blocked, but you will still see a visual notification on the phone's screen.
• Yealink: All on-screen and sound notifications are blocked.

DND presence status sync

Setting DND on the following certified IP Phones will sync the presence state to your desktop and/or mobile client:

• AudioCodes:

  • 445HD, 450HD, C450HD

  • RX50

•  Poly:
  • Egde E series
  • VVX 150, VVX 250, VVX 350, VVX 450
• Yealink:
  • T31G, T31P, T33G, T42S, T43U, T46S, T46U, T48S, T48U, T53, T53W, T54W, T56A, T57W, T58A, T58W
  • VP59

Emergency services location reporting

Emergency services location reporting is supported on these models:

• AudioCodes: 405HD, 445HD, C450HD
• Poly: VVX101, VVX150, VVX201, VVX250, VVX301, VVX311, VVX350, VVX401, VVX411, VVX450, VVX501, VVX601, Edge B and E series, Trio C60, Trio 8500, Trio 8800
  Note: The Edge B series IP phones are an LLDP-MED endpoint that expects an LLDP-MED extension TLV. Admin must make sure the LAN switch supports and is configured with LLDP-MED TLV extension. For more details follow the Poly article.
• Yealink: 
  • SIP: T27G, T31G, T31P, T33G, T42S, T43U, T46U, T48U, T46S, T48S, T53W, T54W, T57W
  • DECT: W60B, W70B, W80B, W90B
  • Android: T58V, T58W, CP960, CP965, VP59

Group call pickup

Group call pickup is supported on these models:

• AudioCodes: 445HD, 450HD, C450HD
• Poly: The following models with firmware version 6.4.1 or higher.
  VVX250, VVX301, VVX311, VVX350, VVX401, VVX411, VVX450, VVX501, VVX601
• Yealink: CP920, CP925, CP960, T27G, T31G, T31P, T33G, T42S, T43U, T46S, T46U, T48S, T53, T53W, T54W, T56A, T57W, T58A, VP59

Hot desking

The following models support hot desking:

• AudioCodes: 445HD, 450HD
• Avaya: J100 series
• Cisco: All certified models
• Poly: All certified models except the following:
  
  • D230
  • ROVE
  • OBI ATA series
• Yealink: All certified models except the following:
  • CP920, CP925, CP960, CP965,
  • W56P, W60P, W70B, W80M, W90M

Tap to Hot desk

If you're using the Zoom client on your Android or iOS device, you can automatically sign into those devices by using the Tap to Hotdesk feature. This is supported on Android/iOS Zoom client version 5.14.0 or higher.

The following models support Tap to hot desk:

Poly: Edge E series

Local survivability

Zoom Phone local survivability is supported on these models:

Cisco: 6800, 7800, and 8800 series

Poly:

• VVX101, VVX201, VVX301, VVX311, VVX401, VVX411, VVX501, VVX601, VVX150, VVX250, VVX350, VVX450
• CCX400, CCX500, CCX505, CCX600, CCX700
• Edge E series
• Trio C60, Trio 8500, Trio 8800

AudioCodes: 445HD, 450HD, C450HD, RX50, MP-112, MP-114, MP-118, MP-124, MP-1288, MP-504, MP-508

Yealink: CP920, CP925, T31G, T31P, T33G, T42S, T46S, T48S, T43U, T46U, T48U, T53, T53W, T54W, T57W, T58W, W60P, W70B, W80DM, W90DM

Message waiting indicator for SLG/SLA

When enabled, IP phones display against the line key of an extension a message waiting indicator to let members of a Shared Line Group or Shared Line Appearance know a message was left on the line.

Submit a request to Zoom Support to enable this feature.

• AudioCodes: All certified models
• Cisco: All certified models
• Grandstream: All certified models
• Poly: All certified models
• Yealink: All certified models

Multiple Line Appearance

Multiple Line Appearance is supported on these models:

• AudioCodes: 445HD, 450HD, C450HD, RX50
• Avaya: J100 series
  Note: Learn more about Keys and positions for Avaya J100.
• Poly:
  • Edge E100, E220, E300, E320, E350, E400, E450, E500, E550
  • VVX201, VVX250, VVX300, VVX301, VVX310, VVX311, VVX350, VVX400, VVX401, VVX410, VVX411, VVX450, VVX500, VVX501, VVX600, VVX601
• Yealink: T31G, T31P, T33G, T43U, T46U, T48U, T53, T53W, T54W, T57W, VP59

Multiple Line Appearance with separate outbound Caller ID is ONLY supported on these models:

• AudioCodes: 45HD, 450HD, C450HD, RX50
• Poly: Edge E100, E220, E300, E320, E350, E400, E450, E500, E550
• Yealink: T31G, T31P, T33G, T43U, T46U, T48U, T53, T53W, T54W, T57W, VP59

Multiple line keys

Multiple line keys are supported on these models:

• AudioCodes: 445HD, 450HD, C450HD
• Cisco: All certified models
• Grandstream: GRP260x, GRP2612, GRP2613, GRP2614, GRP2615, GRP2616, GRP2624, GRP2634, GRP2670  
• Poly: All certified models
• Yealink: All certified models

Multiple phone users per device

You can assign multiple phone users to these models. This feature is also known as
multi-SIP extension registry.

• AudioCodes: All certified MP series gateways
• Cisco: ATA191, ATA192
• Poly: D230, OBi302, OBi504, OBi508, Rove series DECT system
• Yealink: W56P, W60P, W70B, W80, W90

Privacy mode

Privacy mode is supported on these models:

• AudioCodes: 450HD, C450HD
• Yealink: T53, T54W, T57W, T53W, T31P, T31G, T33G, T46U, T43U, T27G, T42S, T46S, T48S, T56A, T58V, VP59

Provision templates

Provision templates are supported on these models.

• AudioCodes: All certified models
• Avaya: All certified models
• Cisco: All certified models
• Grandstream: All certified models
• Poly: All certified models
• Yealink: All certified models

Set up call forwarding

• AudioCodes: All certified models
• Avaya: Zoom does not support this feature but as an alternative, you can log in to the phone web admin portal of the device to modify Settings > Feature Access > Call Forward.
• Cisco: All certified models
• Grandstream: All certified models
• Poly: All certified models
• Yealink: All certified models

Screen lock

The following models support screen lock:

• Poly: All certified models except DECT phones.
• Yealink: All certified models except DECT phones.

Note: Screen lock is only supported on desk phones assigned to one phone user. Screen lock is not supported on common area phones and phones with multiple phone users.

Speed dial and busy lamp field

The following models support speed dial and busy lamp field:

• AudioCodes: 445HD, 450HD
• Avaya: All certified models
• Cisco: All certified models
• Grandstream: GRP260x, GRP2612, GRP2613, GRP2614, GRP2615, GRP2616, GRP2624, GRP2634, GRP2670
• Poly: Edge B10/B20/B30 and E series, CCX 400/500/600/700, VVX 150/250/350/450
  Note: For Edge B series models, speed dial only supports characters 0-9,*,#,a,b,c,d. “Pause” is not supported.
• Yealink: All certified models except CP920, W56P, W60P, W80, W90

Transfer to voicemail

Transfer to voicemail is supported on these models:

• AudioCodes: All certified models
• Cisco: All certified models can use the **EXT DTMF code
• Poly: All certified models
• Yealink: All certified models
• Grandstream: All certified models

Zero touch provisioning (ZTP)

See the list of certified Zoom Phone devices for models that support ZTP.