# Cisco Desk and Room devices for calling

Canonical: https://warmtransfer.net/knowledge/cisco-desk-room-devices-calling

Last verified: 2026-09-25

Cisco Board, Desk, and Room Series devices support calling across cloud, hybrid, and on-premises architectures[^50][^45][^41]. Cisco's deployment guide describes Webex Calling as the recommended calling solution for these devices, while noting that Unified CM remains the most used calling option for on-premises deployments[^50][^45].

## Calling options and registration paths

WarmTransfer's reading of the sources is that the documentation describes 3 distinct ways a Desk or Room device reaches PSTN: cloud registration with Webex Calling, cloud registration with Hybrid Calling through Unified CM, or on-premises registration to Unified CM (optionally Edge-linked), with only the first keeping both registration and call control in the cloud[^43]. 

When adding calling to an existing workspace with Board, Desk, and Room devices in Control Hub, administrators are presented with 3 calling choices: Call on Webex (default), Cisco Webex Calling, and Hybrid Calling through on-premises call control[^41]. When bulk-creating workspaces for RoomOS devices, the calling option is set as WEBEX or WEBEX_CALLING depending on the desired option[^2].

### Call on Webex

The default Call on Webex option allows 1-on-1 calling only, with no additional participant added to the call, and applies to devices in both shared mode and personal mode[^3]. In Control Hub, this choice is labelled 1:1 call, non-PSTN[^4]. RoomOS 26.8.1.3 (dated August 10, 2026) and RoomOS 11.40.1.1 (dated August 17, 2026) added support for end-to-end encrypted 1:1 Webex Calls on supported RoomOS devices[^13][^12].

### Webex Calling

Selecting Cisco Webex Calling for a workspace provides PSTN calling and adds PSTN service to the device through the Webex Calling service[^4][^48]. For shared Webex devices, instructions direct administrators to register the device to the cloud and then add Webex Calling PSTN service to the workspace[^42]. However, Webex Calling cannot be added to the Cisco Room USB[^39].

Only a subset of Cisco Board, Room, and Desk Series devices support native SIP registration to Webex Calling; those that do support the Webex Calling features defined in the Webex Calling Feature Support Matrix[^28]. Per the deployment guide, Webex Calling gives Board, Desk, and Room devices a line and a phone number plus call hold, call transfer, conference/add a participant, voicemail, and a user directory[^49]. On Desk Series devices with Webex Calling enabled, users can call mobile phones and landlines, select and dial from contacts' phone numbers, and use mid-call controls including hold and resume, transfer, add participants to create a conference, and send and receive voicemail[^10][^9].

### Hybrid Calling

For hybrid calling with Unified CM, administrators associate a phone number with a room device or user device by using the Device Connector tool[^25]. Choosing Hybrid Calling for a workspace requires entering the Unified CM mail ID of the account created earlier and downloading the Device Connector to synchronise the Unified CM configuration[^26]. 

With Hybrid Calling for Webex Devices, cloud-registered devices in a workspace become part of the on-premises Unified CM dial plan, allowing them to dial user extensions or the PSTN and receive incoming calls[^17]. Hybrid Calling requires Unified CM 11.5(1)SU3 or later (12.0(1) or later for Session Management Edition) and Expressway X8.11.4 or later[^21]. It also requires a Cisco Spark Remote Device (Spark-RD) virtual device in Unified CM for each workspace[^20]. In this configuration, G.729 is supported when users join a Webex meeting, but G.729 is not supported when a user dials 1:1 from Webex to a SIP device[^18].

### On-premises calling and Webex Edge for Devices

For on-premises devices, Unified CM is the most used calling option, and administrators can configure a room or desk device to route calls through Unified CM[^45]. A Unified CM device package introduces new phone types to Unified CM and installs the firmware and configuration files that enable features on the device[^11]. For instance, Cisco Webex Desk Pro was introduced in cmterm-devicepack12.5.1 (12.5(1.13022)) for Unified CM 12.5(1) and cmterm-devicepack11.5.1 (11.5(1.18121)) for Unified CM 11.5(1) on March 4, 2020[^7]. Webex Desk, Webex Desk Mini, and Webex Board Pro 55 and 75 were introduced in cmterm-devicepack14.0.1 for Unified CM 14.0(1) on September 8, 2021 (Desk) and January 21, 2022 (Desk Mini, Board Pro)[^6].

Webex Edge for Devices keeps a device registered on-premises to Unified CM or Expressway while providing cloud-only features and Control Hub management[^16]. Edge-linked devices continue to use SIP through on-premises infrastructure for internal dialling and external services; calling does not move to the cloud[^14]. RoomOS 26.9.1.4 (September 9, 2026) introduced Zero Touch Provisioning for Edge for Devices, enabling pre-staged devices in Control Hub to discover CUCM and TFTP via DHCP option 150, onboard via Edge for Devices, and register with CUCM[^52]. Device configurations related to H.323, H.320, SIP, NTP, CUCM, LDAP, Proximity, and Far End Camera Control apply only to on-premises registered devices and Webex Edge for Devices, not to Webex-registered devices[^30].

## Shared workspaces and personal mode

Devices operate in either shared workspace mode or personal mode[^3][^47][^35].

| Characteristic | Shared workspace mode | Personal mode |
|---|---|---|
| Assignment | Assigned to a physical location[^47] | Tied to a specific user[^35][^33] |
| Setup and Activation | Admin creates workspace and 16-digit activation code in Control Hub[^1] | User activation code via Webex User Hub / Webex App, or admin Zero Touch Activation[^46][^51] |
| Calling behaviour | Workspace licensing governs device count and PSTN[^5][^48] | Webex calls/meetings route to device; URI calls route via Webex App[^33][^36] |

### Shared workspaces

A workspace device is assigned to a physical location rather than a specific user, enabling shared usage[^47]. Setting up a shared Board, Desk, or Room device requires an administrator to create a workspace and generate a 16-digit activation code in Control Hub, which is entered into the device setup wizard[^1]. 

Licensing limits device counts within workspaces:
- A workspace with a Common area workspace license can hold only 1 device[^5].
- A workspace with a Professional workspace license can hold up to 5 Cisco Desk Phones, Cisco MPP phones, ATAs, or third-party devices; the documentation does not name RoomOS devices for this allowance[^38].

The Hot Desking scheduling service allows users to sign in to and book any shared Board or Desk Series device using their Webex identity[^22]. WarmTransfer's reading of the sources is that the July 2025 add-services article describing hot desking as a Board and Desk Series capability is likely outdated for Room Series devices given the February 2026 RoomOS release note[^24].

### Personal mode

Personal mode ties a Board, Desk, or Room device to a specific person in the manner of a personal laptop or phone[^35]. A newly registered device must run software version CE9.0.1 or later to be set up as a personal device[^34]. Control Hub assigns the device to a user so that the user's Webex calls and meetings reach the unit[^33]. 

Users can set up personal-mode devices without administrator privileges by obtaining an activation code from Webex User Hub or the Webex App[^46]. If an activation code expires before setup, the user can generate a replacement code in the Webex App[^32]. Alternatively, RoomOS 26.9.1.4 supports Zero Touch Activation for personal mode, allowing administrators to provision supported devices directly from Control Hub by entering the MAC address and assigning the user[^51].

Users with a Webex Calling Professional license can make and receive external calls with a phone number or extension on their personal Board, Desk, or Room device[^37]. When Webex Calling is enabled on a personal device, calls placed to a URI continue to route through the Webex App service rather than Webex Calling[^36]. When enabled for Hybrid Calling, dialled numbers route through the enterprise network like a PSTN call, whereas SIP calls route through the Webex cloud[^19].

## Software release branches

The RoomOS release notes state that older devices remain on the RoomOS 11 branch, which receives bug fixes until April 2027 and security updates until April 2030[^40].

## See also

See also [Webex Calling supported devices and MPP firmware](https://warmtransfer.net/knowledge/webex-calling-device-support).
See also [Webex Calling license types and entitlements](https://warmtransfer.net/knowledge/webex-calling-licensing).
See also [Webex Calling calling features and feature parity vs UCM](https://warmtransfer.net/knowledge/webex-calling-features).

## Applicability

Applies to: Cisco Board, Cisco Control Hub, Cisco Room USB, Cisco Webex Calling, Cisco Hybrid Calling for Webex Devices, Cisco Webex App, Cisco Webex Edge for Devices, Cisco RoomOS, Cisco Desk Series, and Cisco Unified Communications Manager. Deployments: on-premises, hybrid, and multi-tenant. Sources checked 2026-09-25. CE9.0.1 or later is required for registering a device in personal mode[^34]. Hybrid Calling requires Unified CM 11.5(1)SU3 or later (or 12.0(1) or later for Session Management Edition) and Expressway X8.11.4 or later[^21]. Zero Touch Provisioning for Edge for Devices and Zero Touch Activation for personal mode require RoomOS 26.9.1.4 or later[^52][^51]. The RoomOS 11 branch receives bug fixes until April 2027 and security updates until April 2030[^40].

## What remains uncertain

Emergency calling and E911 dispatchable location handling for RoomOS devices on Webex Calling is not covered by the sources below. Specific feature rows in the Webex Calling Feature Support Matrix for RoomOS devices are not covered by the sources below. Line count and shared-line or multiline behaviour on RoomOS devices with Webex Calling is not covered by the sources below. Whether RoomOS devices may join or count toward the 5-device Professional workspace limit is not covered by the sources below. The regional availability of PSTN calling for workspace devices is not covered by the sources below. The mapping of device models to release branches is not covered by the sources below. Teams Rooms mode on Cisco Room devices and how calling operates in that mode is not covered by the sources below. The reconciliation of minimum firmware requirements between CE8.3.4 and RoomOS 10.x on the supported devices page is not covered by the sources below.

## Sources

[^1]: Before a shared Board, Desk, or Room device is set up, the admin creates a workspace and a 16-digit activation code in Control Hub, which is entered in the device setup wizard. Source: [Activate a Board, Desk, or Room series device](https://help.webex.com/article/n3hi0z8/Activate-a-Cisco-Webex-Room-or-Desk-Device-or-Webex-Board), Before you begin; Installation and setup steps 1-2. Checked 2026-09-25.
[^2]: When bulk-creating workspaces for RoomOS devices, the calling option is entered as WEBEX or WEBEX_CALLING depending on the desired calling option. Source: [Configure and manage Webex Calling devices](https://help.webex.com/en-us/article/n9r1aac/Configure-and-manage-Webex-Calling-devices), Add and assign devices in bulk. Checked 2026-09-25.
[^3]: The default Call on Webex option allows 1-on-1 calling only, with no additional participant added to the call, and applies to devices in both shared mode and personal mode. Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Calling section, Call on Webex (Default) paragraph. Checked 2026-09-25.
[^4]: When adding a Cisco Room and Desk device to a new workspace in Control Hub, the Call on Webex choice is labelled 1:1 call, non-PSTN, while Cisco Webex Calling is the choice that provides PSTN calling. Source: [Configure and manage Webex Calling devices](https://help.webex.com/en-us/article/n9r1aac/Configure-and-manage-Webex-Calling-devices), Add a board, desk, or room device to a new workspace, service selection step. Checked 2026-09-25.
[^5]: A workspace with a Common area workspace license can have only one device. Source: [Configure and manage Webex Calling devices](https://help.webex.com/en-us/article/n9r1aac/Configure-and-manage-Webex-Calling-devices), Add and assign devices in bulk, license note. Checked 2026-09-25.
[^6]: The matrix lists Webex Desk, Webex Desk Mini, and Webex Board Pro 55 and 75 in cmterm-devicepack14.0.1 for Unified CM 14.0(1), with dates September 8, 2021 (Desk) and January 21, 2022 (Desk Mini, Board Pro). Source: [Cisco Unified Communications Manager Device Package Compatibility Matrix - Current Cisco Unified Communications Manager Device Package Releases](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/compat/matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix_chapter_00.html), Unified CM 14.0(1) table. Checked 2026-09-25.
[^7]: The device package compatibility matrix lists Cisco Webex Desk Pro in cmterm-devicepack12.5.1 (12.5(1.13022)) for Unified CM 12.5(1) and cmterm-devicepack11.5.1 (11.5(1.18121)) for Unified CM 11.5(1), both dated March 4, 2020. Source: [Cisco Unified Communications Manager Device Package Compatibility Matrix - Current Cisco Unified Communications Manager Device Package Releases](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/compat/matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix_chapter_00.html), Unified CM 12.5(1) and 11.5(1) tables, Cisco Webex Desk Pro rows. Checked 2026-09-25.
[^8]: Desk Pro is among the Board, Room, and Desk Series models listed as supporting native SIP registration for Webex Calling on the supported-devices page. Source: [Supported devices for Webex Calling](https://help.webex.com/en-us/article/qkwt4j/Supported-Devices-for-Webex-Calling), Cisco Board, Room, and Desk Series Devices section, model list. Checked 2026-09-25.
[^9]: On a Desk Series device with Webex Calling enabled, calls to phone numbers expose hold and resume, transfer, add participants to create a conference, and voicemail send and receive. Source: [Make a call from Desk Series](https://help.webex.com/en-us/article/jkmyvf/Make-a-call-from-Desk-Series), If Webex Calling is enabled on your device section. Checked 2026-09-25.
[^10]: With Webex Calling enabled on a Desk Series device, users can call mobile phones and landlines and see contacts' phone numbers to select and dial. Source: [Make a call from Desk Series](https://help.webex.com/en-us/article/jkmyvf/Make-a-call-from-Desk-Series), If Webex Calling is enabled on your device section. Checked 2026-09-25.
[^11]: A Unified CM device package introduces new phone types to Unified CM and installs the firmware and configuration files that enable features on the Cisco device. Source: [Cisco Unified Communications Manager Device Package Compatibility Matrix - Current Cisco Unified Communications Manager Device Package Releases](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/compat/matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix_chapter_00.html), Introductory paragraph. Checked 2026-09-25.
[^12]: The same end-to-end encrypted 1:1 Webex Calls feature is listed for RoomOS 11.40.1.1, dated August 17, 2026. Source: [Release notes for RoomOS software](https://help.webex.com/en-us/article/6ger7db/Release-notes-for-RoomOS-software), RoomOS 11.40.1.1 heading, End-to-end encrypted 1:1 Webex Calls. Checked 2026-09-25.
[^13]: RoomOS 26.8.1.3, dated August 10, 2026 in the release notes, adds support for end-to-end encrypted 1:1 Webex Calls on supported RoomOS devices. Source: [Release notes for RoomOS software](https://help.webex.com/en-us/article/6ger7db/Release-notes-for-RoomOS-software), RoomOS 26.8.1.3 heading, End-to-end encrypted 1:1 Webex Calls. Checked 2026-09-25.
[^14]: Devices linked with Webex Edge for Devices continue to use SIP through the on-premises infrastructure for internal dialling and external services; calling does not move to the cloud. Source: [Webex Edge for Devices](https://help.webex.com/en-us/article/cy2l2z/Webex-Edge-for-Devices), Overview / architecture section on registration and calling. Checked 2026-09-25.
[^15]: Webex Edge for Devices requires device software CE9.15.3 or later and Unified CM 11.5(1)SU3, 12.5(1) or later. Source: [Webex Edge for Devices](https://help.webex.com/en-us/article/cy2l2z/Webex-Edge-for-Devices), Requirements section. Checked 2026-09-25.
[^16]: Webex Edge for Devices keeps a device registered on-premises to Unified CM or Expressway while giving it access to cloud-only features and Control Hub management. Source: [Webex Edge for Devices](https://help.webex.com/en-us/article/cy2l2z/Webex-Edge-for-Devices), Overview section. Checked 2026-09-25.
[^17]: With Hybrid Calling for Webex Devices, cloud-registered devices in a Workspace become part of the on-premises Unified CM dial plan and can call user extensions or the PSTN and receive incoming calls. Source: [Deployment guide for Hybrid Calling for Webex Devices (Device Connector) - Overview of Hybrid Calling for Webex Devices](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/hybridservices/hybridcalldevices/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call_chapter_00.html), Hybrid Calling for devices in Workspaces. Checked 2026-09-25.
[^18]: In Hybrid Calling for Webex Devices, G.729 is supported when users join a Webex meeting but not when a user dials 1:1 from Webex to a SIP device. Source: [Deployment guide for Hybrid Calling for Webex Devices (Device Connector) - Prepare your environment for Hybrid Calling for Webex Devices](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/hybridservices/hybridcalldevices/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call_chapter_01.html), Requirements, codec support. Checked 2026-09-25.
[^19]: On a personal-mode device enabled for Hybrid Calling, dialled numbers go through the enterprise like a PSTN call, but SIP calls always go through the Webex cloud. Source: [Deployment guide for Hybrid Calling for Webex Devices (Device Connector) - Overview of Hybrid Calling for Webex Devices](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/hybridservices/hybridcalldevices/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call_chapter_00.html), Hybrid Calling for devices associated with users (Personal Mode). Checked 2026-09-25.
[^20]: Hybrid Calling for Webex Devices requires a Cisco Spark Remote Device (Spark-RD) virtual device in Unified CM for each Workspace. Source: [Deployment guide for Hybrid Calling for Webex Devices (Device Connector) - Prepare your environment for Hybrid Calling for Webex Devices](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/hybridservices/hybridcalldevices/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call_chapter_01.html), Requirements, Unified CM device type. Checked 2026-09-25.
[^21]: Hybrid Calling for Webex Devices requires Unified CM 11.5(1)SU3 or later (12.0(1) or later for Session Management Edition) and Expressway X8.11.4 or later. Source: [Deployment guide for Hybrid Calling for Webex Devices (Device Connector) - Prepare your environment for Hybrid Calling for Webex Devices](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/hybridservices/hybridcalldevices/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call/wbxhs_m_deployment-guide-for-webex-devices-hybrid-call_chapter_01.html), Requirements, Unified CM and Expressway versions. Checked 2026-09-25.
[^22]: The Hot Desking scheduling service lets users sign in to and book any shared Board or Desk Series device with their Webex identity. Source: [Add services to an existing workspace with Board, Desk, and Room Series devices](https://help.webex.com/article/zgjezbb/Add-services-to-an-existing-workspace-with-Board,-Desk,-and-Room-Series-devices), Scheduling service options, Hot Desking. Checked 2026-09-25.
[^23]: A February 2026 RoomOS release extended the hot-desking experience, previously on Board and Desk Series, to all Room Series devices. Source: [Release notes for RoomOS software](https://help.webex.com/en-us/article/6ger7db/Release-notes-for-RoomOS-software), February 2026 release entry, hot desking item. Checked 2026-09-25.
[^24]: The July 2025 add-services article describing hot desking as a Board and Desk Series capability is likely outdated for Room Series devices given the February 2026 RoomOS release note (inferred). Source: [Release notes for RoomOS software](https://help.webex.com/en-us/article/6ger7db/Release-notes-for-RoomOS-software), February 2026 hot desking item compared with zgjezbb Scheduling service options. Checked 2026-09-25.
[^25]: For hybrid calling with Unified CM, administrators associate a phone number with a room device or a user's device by using the Device Connector tool. Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Calling section, Hybrid calling paragraph. Checked 2026-09-25.
[^26]: Choosing Hybrid Calling for a workspace requires entering the Unified CM mail ID of the account created earlier and downloading the Device Connector to synchronise the Unified CM configuration. Source: [Add services to an existing workspace with Board, Desk, and Room Series devices](https://help.webex.com/article/zgjezbb/Add-services-to-an-existing-workspace-with-Board,-Desk,-and-Room-Series-devices), Procedure step 2, Hybrid Calling option. Checked 2026-09-25.
[^27]: The minimum software for Webex Calling on RoomOS devices is stated two ways on the same page: CE8.3.4 or later depending on device type, and RoomOS 10.x or newer for Webex Calling support (disputed). Source: [Supported devices for Webex Calling](https://help.webex.com/en-us/article/qkwt4j/Supported-Devices-for-Webex-Calling), Cisco Board, Room, and Desk Series Devices section, software requirement sentences. Checked 2026-09-25.
[^28]: Only some Cisco Board, Room, and Desk Series devices support native SIP registration to Webex Calling, and those that do support the Webex Calling features defined in the Webex Calling Feature Support Matrix. Source: [Supported devices for Webex Calling](https://help.webex.com/en-us/article/qkwt4j/Supported-Devices-for-Webex-Calling), Cisco Board, Room, and Desk Series Devices section, introductory paragraph. Checked 2026-09-25.
[^29]: To add a Room or Desk device to a new workspace, the admin goes to Management > Devices > Add device, selects Shared usage and New workspace, chooses Cisco Room and Desk device, picks the calling service, selects a Professional or Common area workspace license, assigns location, number and extension, and then activates with the provided code. Source: [Configure and manage Webex Calling devices](https://help.webex.com/en-us/article/n9r1aac/Configure-and-manage-Webex-Calling-devices), Add a board, desk, or room device to a new workspace, numbered steps. Checked 2026-09-25.
[^30]: Device configurations related to H.323, H.320, SIP, NTP, CUCM, LDAP, Proximity and Far End Camera Control apply only to on-premises registered devices and devices linked with Webex Edge for Devices, not to Webex-registered devices. Source: [Device configurations for Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/n5pqqcm/Device-configurations-for-Board,-Desk,-and-Room-Series-devices), Introductory section on configurations not applicable to Webex registered devices. Checked 2026-09-25.
[^31]: To assign a personal device from the Devices page, the admin clicks Add Device, selects Personal usage, searches for and selects the user, and gives the user the 16-digit activation code. Source: [Assign a personal Board, Desk, or Room device to a user](https://help.webex.com/en-us/article/zfbu4j/Assign-a-personal-Board,-Desk,-or-Room-device-to-a-user), Via Devices tab procedure, steps 1-4. Checked 2026-09-25.
[^32]: If a personal-device activation code expires before the user activates the device, the user can generate a new activation code in the Webex App. Source: [Assign a personal Board, Desk, or Room device to a user](https://help.webex.com/en-us/article/zfbu4j/Assign-a-personal-Board,-Desk,-or-Room-device-to-a-user), Note following the assignment procedures. Checked 2026-09-25.
[^33]: Control Hub can assign a Board, Desk, or Room device to a user as a personal device so the user's Webex calls and meetings reach that device. Source: [Configure and manage Webex Calling devices](https://help.webex.com/en-us/article/n9r1aac/Configure-and-manage-Webex-Calling-devices), Add a board, desk, or room device to a user. Checked 2026-09-25.
[^34]: The personal-mode setup article states a newly registered device must run software version CE9.0.1 or later to be set up as a personal device. Source: [Set up your Board, Desk, or Room Series device as a personal device](https://help.webex.com/en-us/article/n3alqtv/Set-Up-a-Room-or-Desk-Device-as-a-Personal-Device), Setup requirements paragraph. Checked 2026-09-25.
[^35]: Personal mode ties a Board, Desk, or Room device assigned to a user to that specific user, in the way a laptop or phone is assigned to one person. Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Personal mode paragraph under Devices. Checked 2026-09-25.
[^36]: On a personal device with Webex Calling, calls placed to a URI continue to be routed through the Webex App service rather than Webex Calling. Source: [Assign a personal Board, Desk, or Room device to a user](https://help.webex.com/en-us/article/zfbu4j/Assign-a-personal-Board,-Desk,-or-Room-device-to-a-user), Calling capabilities paragraph. Checked 2026-09-25.
[^37]: Users with a Webex Calling Professional license can use their personal Board, Desk, or Room device to make and receive external calls with a phone number or extension-based calling. Source: [Assign a personal Board, Desk, or Room device to a user](https://help.webex.com/en-us/article/zfbu4j/Assign-a-personal-Board,-Desk,-or-Room-device-to-a-user), Calling capabilities paragraph. Checked 2026-09-25.
[^38]: A workspace with a Professional workspace license can hold up to 5 Cisco Desk Phones, Cisco MPP phones, ATAs, or third-party devices; the sentence does not name RoomOS devices. Source: [Configure and manage Webex Calling devices](https://help.webex.com/en-us/article/n9r1aac/Configure-and-manage-Webex-Calling-devices), Add and assign devices in bulk, license note. Checked 2026-09-25.
[^39]: Webex Calling cannot be added to the Cisco Room USB. Source: [Activate a Board, Desk, or Room series device](https://help.webex.com/article/n3hi0z8/Activate-a-Cisco-Webex-Room-or-Desk-Device-or-Webex-Board), Before you begin, note on adding Webex Calling. Checked 2026-09-25.
[^40]: The RoomOS release notes state that older devices remain on the RoomOS 11 branch, which receives important bug fixes until April 2027 and security updates until April 2030. Source: [Release notes for RoomOS software](https://help.webex.com/en-us/article/6ger7db/Release-notes-for-RoomOS-software), Introductory note on RoomOS 26 and RoomOS 11 branches. Checked 2026-09-25.
[^41]: When adding calling to an existing workspace with Board, Desk, and Room devices, Control Hub offers three calling choices: Call on Webex (default), Cisco Webex Calling, and Hybrid Calling through on-premises call control. Source: [Add services to an existing workspace with Board, Desk, and Room Series devices](https://help.webex.com/article/zgjezbb/Add-services-to-an-existing-workspace-with-Board,-Desk,-and-Room-Series-devices), Procedure step 2, calling configuration options. Checked 2026-09-25.
[^42]: For Webex devices in shared mode, the supported-devices page says to register them to the cloud and then add Webex Calling PSTN service to the Workspace. Source: [Supported devices for Webex Calling](https://help.webex.com/en-us/article/qkwt4j/Supported-Devices-for-Webex-Calling), Page introduction. Checked 2026-09-25.
[^43]: The sources describe three distinct ways a Desk or Room device reaches PSTN: cloud registration with Webex Calling, cloud registration with Hybrid Calling through Unified CM, or on-premises registration to Unified CM (optionally Edge-linked), and only the first keeps both registration and call control in the cloud (inferred). Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Calling section read with Webex Edge for Devices overview and Hybrid Calling overview. Checked 2026-09-25.
[^44]: The Unified CM Release 15 activation-code onboarding chapter lists only Cisco IP Phone 7800 and 8800 series models as supported and does not list Board, Desk, or Room devices. Source: [System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Device Onboarding via Activation Codes](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/15/systemConfig/cucm_b_system-configuration-guide-15/cucm_b_system-configuration-guide-14_chapter_0100000.html), Supported devices section. Checked 2026-09-25.
[^45]: Cisco's deployment guide states that for on-premises devices Unified CM is currently the most used calling option, and an admin can configure a room or desk device to call through Unified CM. Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Calling section, Unified CM paragraph. Checked 2026-09-25.
[^46]: A user can obtain an activation code from Webex User Hub or the Webex App to set up a personal-mode device without being an administrator. Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Personal mode / activation code paragraph. Checked 2026-09-25.
[^47]: A Workspaces device is not assigned to a specific user but to a physical location, allowing shared usage. Source: [Configure and manage Webex Calling devices](https://help.webex.com/en-us/article/n9r1aac/Configure-and-manage-Webex-Calling-devices), Add a board, desk, or room device to a new workspace, introduction. Checked 2026-09-25.
[^48]: Selecting Cisco Webex Calling for a workspace adds PSTN service to the device in that workspace through the Webex Calling service. Source: [Add services to an existing workspace with Board, Desk, and Room Series devices](https://help.webex.com/article/zgjezbb/Add-services-to-an-existing-workspace-with-Board,-Desk,-and-Room-Series-devices), Procedure step 2, Cisco Webex Calling option. Checked 2026-09-25.
[^49]: Per the deployment guide, Webex Calling gives Board, Desk, and Room devices a line and a phone number plus call hold, call transfer, conference/add a participant, voicemail and user directory. Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Calling section, Webex Calling paragraph and bullet list. Checked 2026-09-25.
[^50]: Cisco's deployment guide for Board, Desk, and Room Series devices describes Webex Calling as the recommended calling solution for these devices. Source: [Deploy Board, Desk, and Room Series devices](https://help.webex.com/en-us/article/vehbsp/Deploy-Board,-Desk,-and-Room-Series-devices), Calling section, Webex Calling paragraph. Checked 2026-09-25.
[^51]: RoomOS 26.9.1.4 adds Zero Touch Activation for personal mode, letting admins provision supported personal-mode devices from Control Hub by entering the MAC address and assigning the device to a user. Source: [Release notes for RoomOS software](https://help.webex.com/en-us/article/6ger7db/Release-notes-for-RoomOS-software), RoomOS 26.9.1.4 heading, Zero Touch Activation for personal mode. Checked 2026-09-25.
[^52]: RoomOS 26.9.1.4 (September 9, 2026) adds Zero Touch Provisioning for Edge for Devices: devices pre-staged in Control Hub use DHCP option 150 to discover CUCM and TFTP, onboard through Edge for Devices, and register with CUCM. Source: [Release notes for RoomOS software](https://help.webex.com/en-us/article/6ger7db/Release-notes-for-RoomOS-software), RoomOS 26.9.1.4 heading, Zero Touch Provisioning for Edge for Devices. Checked 2026-09-25.