00 · Header

T2 · Webex Calling

Devices & Provisioning

A phone joins Webex Calling by MAC address or by a 16-digit activation code. A blank MAC in Control Hub generates the code. The code lasts 30 days on an MPP phone and 7 days on a Room device. A professional workspace license holds up to five phones. A common-area workspace holds one.

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01 · Executive summary

Five lines, then why it matters

• MPP firmware 11.3.1 SR2 or later is required to enter an activation code on the phone. The phone reboots and onboards after the code is entered. [cite:1]
• CSV device type IP is for MPP, ATA, and DECT. WEBEX or WEBEX_CALLING is for RoomOS workspaces. The article’s example MAC is 001A2B3C4D5E. [cite:1]
• A workspace device is assigned to the workspace, not to a user. Add it from Management > Devices > Add device, or from Management > Workspaces. [cite:3]
• Calling service choices for a Board, Desk, or Room workspace include None, Call on Webex (1:1, non-PSTN, the default), Cisco Webex Calling, premises calling, and legacy Hybrid Calling. [cite:3]
• Only specific roles can generate activation codes. The article points at the organization-role article for which roles. Role names stay in T1-R05. [cite:2]

02 · Architecture map

Two ways onto the cloud

• 1MAC
• 2Activation code
• 3User or workspace
• 4Onboard

flowchart LR
  Admin[Control Hub] --> MAC[MAC claim]
  Admin --> Code[16-digit code]
  Code --> Phone[Phone reboot]
  Phone --> Cloud[Webex Calling]

Studio asset still required: assets/diagrams/T2-R04/arch.svg

03 · Concept deep-dive

Claim, license, then calling service

The add-device article is dated September 01, 2026. The activation-code article is dated January 12, 2026. The shared-workspace article is dated April 21, 2026. [cite:1] [cite:2] [cite:3]

Activation-code models named on September 01, 2026

The same article says all listed devices can register by MAC address, and that the activation-code path is the subset above. Use activation codes for RoomOS. [cite:1]

Workspace limits and calling choices

Code handling

04 · Ecosystem

Ecosystem and sister technologies

Glossary

MAC claim

Registration by the device MAC address. The add-device article says every device it lists can use this path. [cite:1]

Activation code

A 16-digit code from Control Hub. Blank MAC generates one. [cite:1] [cite:2]

MPP

Multiplatform phone. The activation-code subset is the model list in the core table. [cite:1]

RoomOS

The article says to use activation codes for RoomOS, and CSV types WEBEX or WEBEX_CALLING for RoomOS workspaces. [cite:1]

Professional workspace license

Allows up to five of the phone types the April 21, 2026 article names. [cite:3]

Common area workspace license

Allows one device on the workspace. [cite:3]

Call on Webex

1:1, non-PSTN calling. The default calling service when you add Board, Desk, or Room devices. [cite:3]

Companion Mode

The exception that allows one Board and one Room Series device in the same workspace. [cite:3]

Mind map

mindmap
  root((Device))
    MAC
    Activation code
    Workspace license
    Calling service
    ATA network

Sister-technology matrix

Integration edges

Cross-platform bridges

Future-integration hooks

• MPP Actions already include apply configuration and update firmware. A later room can attach line keys once the phone is online. [cite:1]
• Canon planning: record code expiry beside the device type so a Room device is not left on a 30-day assumption.
• The nightly location resync is the article’s timing for a location change on the workspace. [cite:3]

Ecosystem troubleshooting

05 · Flow

From a blank MAC to a registered phone

06 · Config

Click paths

1. For a user phone, open Users, select the user, open Devices, and click Add Device. Choose the device type and click Add device. [cite:2]
2. For a shared phone, open Management > Devices > Add device, or Management > Workspaces > Add workspace. Choose Shared usage, then New workspace. [cite:3]
3. Name the workspace within 128 characters and avoid % # < > / \ and ". Set room type, capacity, and location. [cite:3]
4. Choose Cisco Desk Phone, or Cisco MPP, Wireless, ATA, or third-party device with Cisco Managed Devices. Pick Professional workspace or Common area workspace. [cite:3]
5. Assign the location’s phone number and, if you want one, an extension. Save. [cite:3]
6. Enter a MAC address, or leave it blank so Control Hub generates an activation code. For RoomOS, use the code. [cite:1]
7. Copy, email, or print the 16-digit code. On an MPP, confirm firmware 11.3.1 SR2 or later, enter the code, and let the phone reboot. [cite:1] [cite:2]
8. For an ATA, set VLAN, IP address, and subnet mask before that activation. [cite:2]
9. For Board, Desk, or Room Series, choose the calling service: None, Call on Webex, Cisco Webex Calling, premises calling, or legacy Hybrid Calling. Activate with the code. [cite:3]

Screenshot placeholder. The paths above are the articles.

07 · Limits

Values the articles state

08 · Troubleshooting

Eight provisioning failures

09 · Self-question ladder

Twelve rungs

10 · Lab

Paper phones, no production claim

• Goal: choose MAC or code, the license cap, and the calling service for four devices.
• Prereq: this room. Do not activate a production phone.
• Step 1. An 8841 on old firmware needs a code. Expected: upgrade to 11.3.1 SR2 or later first.
• Step 2. A RoomOS device. Expected: activation code, CSV type WEBEX or WEBEX_CALLING, 7-day expiry.
• Step 3. A lobby on a common-area license. Expected: one device.
• Step 4. A professional workspace already has five phones. Expected: Add Device is disabled.
• Step 5. An ATA still needs a voice VLAN. Expected: set it before activation.
• Evidence: the four choices with cites.
• Break it: leave Call on Webex selected and promise PSTN. Recovery: that choice is non-PSTN. Select Cisco Webex Calling.
• Reflection: which of your rooms are still planned as common area when they need a second phone.

11 · Quiz

Twelve questions

12 · Audio

Slots for Studio

13 · Interview

Oral answers

30 seconds. I claim a phone by MAC or by a 16-digit activation code. MPP codes last 30 days and Room codes last 7. A professional workspace holds five phones. A common-area workspace holds one.

2 minutes. All of the listed devices can use a MAC. The activation-code subset is the 6800, 7800, and 8800 models the September 2026 article names, plus 7832, 8832, 9800, 9821, and 8875. RoomOS uses a code, and the CSV types are WEBEX or WEBEX_CALLING. An MPP needs firmware 11.3.1 SR2 before the code is typed, then it reboots. I can copy, email, or print the code, including to someone who is not the assignee. An ATA gets its VLAN and IP address first, because those settings lock after activation. If the room needs PSTN I choose Cisco Webex Calling, not the default Call on Webex service.

30 seconds, delete. Deleting a workspace factory-resets an online MPP and returns it to the code screen. An offline phone needs a manual reset.

2 minutes, what I will not merge. I will not put a second device type in one space unless Companion Mode or a standalone Room Navigator applies. I will not promise PSTN on Call on Webex. I will not generate a code with a role the organization-role article does not allow. Migration licenses from Enterprise firmware are a different article.

What you will say about the nightly job. The workspace article says the location is updated during the nightly resync.

14 · Citations

1. Add a device — help.webex — article n9r1aac — help.webex.com article n9r1aac — header September 01, 2026 — retrieved 2026-10-14. MAC or activation code, model subset, RoomOS codes, CSV types IP and WEBEX or WEBEX_CALLING, example MAC, firmware 11.3.1 SR2, MPP actions, phone reboot.
2. Generate an activation code for a device — help.webex — article ndb7w0db — help.webex.com article ndb7w0db — header January 12, 2026 — retrieved 2026-10-14. 16 digits, 30 days for MPP, 7 days for Room devices, Copy Email or Print, ATA network settings before activation, role pointer.
3. Add shared devices and services to a workspace — help.webex — article 1mqb9cb — help.webex.com article 1mqb9cb — header April 21, 2026 — retrieved 2026-10-14. Five devices on a professional workspace, one on common area, calling service choices, workspace name rules, Companion Mode, delete and factory reset, nightly location resync.

15 · Re-engineer later

• Open questions: whether the activation-code model list gains phones after September 01, 2026.
• Facts still TODO-verify: 0.
• Assets missing: Add Device screenshot, audio.
• Ideas for v1.0: a card that pairs device family with code lifetime.
• Next review: when n9r1aac or 1mqb9cb changes the model list or the five-device cap.