CanonT11

00 · Header

A bridge is not a cutover

A bridge is not a cutover T11R01 StayBridgeMoveCheck
Illustrated scene for A bridge is not a cutover. Original drawing, not a product screenshot.

T11-R01. Fundamentals. The Unified CM migration guide is about Webex Calling multi-tenant. It also lists reasons to keep call control on premises. A bridge is one of those designs, not a finished move. [cite:14]

Reading 9 minWrittenStudy notes

01 · TL;DR

Five lines, then why it matters

  • In nbedetf, Webex Calling always means Webex Calling multi-tenant. [cite:14]
  • Local Gateway is a bridge between the on-premises network and Webex Calling, for PSTN and for calling between Unified CM and cloud endpoints. [cite:14]
  • The guide lists reasons a customer may keep call control on premises, including unsupported phones, a complex dial plan, and a contact center that is not moving yet. [cite:14]
  • PPDIO is Prepare, Plan, Design, Implement, and Optimize. [cite:14]
  • T6 is the migration track. This chapter is the bridge view.

02 · Map

Two honest outcomes

Move the calling workload, or keep Unified CM and connect it. The article says the choice follows functionality, and it names customers who should consider staying. [cite:14]

03 · Core

What the opened pages say

nbedetf is for teams who already administer Unified CM and Cisco endpoints. It explains components, PSTN options, supported endpoints, and security, using PPDIO. [cite:14]

Before, the on-premises picture is Unified CM, Expressway-C/E for mobile and remote access and business-to-business, optional meetings and Unity Connection, and Cisco phones and Jabber. [cite:14]

Reasons to consider staying include unsupported phone models, complex integrations, a complex dial plan or granular classes of service, poor internet, strict data-ownership rules, on-premises recording requirements, third-party integrations without a Webex alternative, and contact-center integrations where the contact center is not moving yet. [cite:14]

After, the new pieces include Webex Calling, Directory Connector or the Entra ID Wizard, Local Gateway, Survivability Gateway, Cisco Calling Plan or Cloud Connect PSTN, and Webex App. [cite:14]

04 · Ecosystem

Ecosystem and sister technologies

Webex Calling, in nbedetf
Multi-tenant only. The guide says the term always means that. [cite:14]
Local Gateway
A bridge for PSTN and for calls between Unified CM registered and cloud registered endpoints. [cite:14]
PPDIO
Prepare, Plan, Design, Implement, Optimize. [cite:14]
Stay case
A listed reason to keep on-premises call control, including a contact center that is not moving. [cite:14]

Sister-technology matrix

SisterWhat the opened page supportsWhy it matters hereCite
Dedicated InstanceA different calling home. T5 and T11-R03.nbedetf is not the Dedicated Instance guide.[cite:14]
T6 cutoverThe migration rooms.A bridge can be a phase, which the Local Gateway sentence allows.[cite:14]
Survivability GatewayFallback for on-site Webex Calling endpoints during a network outage.Not the same box as Local Gateway.[cite:14]

Integration edges

FromToMechanismCite
Unified CMWebex CallingLocal Gateway, including a phased migration.[cite:14]
Contact center still on premisesDecision to stayNamed in the stay list.[cite:14]
Active DirectoryWebexDirectory Connector, or Entra ID Wizard if identity already moved.[cite:14]

05 · Flow

Order of operations

  1. Say whether the guide’s Webex Calling is the product you mean. It is multi-tenant.
  2. Check the stay list before you promise a full move.
  3. If the contact center stays, draw a bridge and open T11-R03.
  4. Name Local Gateway and Survivability Gateway as different boxes.

06 · Config

Clicks the articles print

  • The guide points to Webex migration tools in Control Hub, certified migration providers, and Webex Setup Assist. It does not make those three the same thing. [cite:14]

07 · Limits

Limits the articles state

ItemValueSource
ScopeUnified CM to Webex Calling multi-tenant only.[cite:14]
Local Gateway rolePSTN and on-premises to cloud calling integration.[cite:14]
Phones through the gatewayThe article describes endpoint registration on Webex Calling, and Local Gateway as the bridge. It does not say phones register through the gateway.[cite:14]

08 · Trouble

Trouble

SymptomWhat the article supportsDo thisCite
Dedicated Instance is designed from nbedetf aloneThat guide defines Webex Calling as multi-tenant.Use the Dedicated Instance article for DI.[cite:14]
The contact center is still on UCCE and the plan deletes Unified CM firstA contact center that is not moving is a listed reason to reconsider.Keep call control until the contact-center design says otherwise.[cite:14]

09 · Self-question

Oral ladder

L1What does Webex Calling mean inside nbedetf?

Webex Calling multi-tenant. [cite:14]

L2What is Local Gateway in that guide?

A bridge for PSTN and between Unified CM and cloud endpoints. [cite:14]

L3Name two reasons the guide says you might stay.

Unsupported phones, a complex dial plan, poor internet, or a contact center that is not moving. Any two. [cite:14]

10 · Lab

Read it back

11 · Quiz

Quiz

Q1Check

Is nbedetf a Dedicated Instance guide?

Answer

No. It says Webex Calling in the document always means multi-tenant. [cite:14]

Q2Check

What does PPDIO stand for?

Answer

Prepare, Plan, Design, Implement, Optimize. [cite:14]

Q3Check

Which new box is the outage fallback for Webex Calling phones on site?

Answer

Survivability Gateway. [cite:14]

12 · Audio

Read-along uses the page

13 · Interview

Oral-ready

30 seconds. The migration guide moves Unified CM to multi-tenant Webex Calling, and it also tells some customers to keep call control. Local Gateway is the bridge. [cite:14]

2 minutes. I check unsupported phones, dial plan, internet, recording, and whether the contact center is moving. Directory Connector and the Entra wizard are identity, not the trunk. Survivability Gateway is the outage box. [cite:14]

14 · Citations

Ledger

Opened 2026-10. Mirrors cites/T11-R01.md.

  1. Introduction, Unified CM to Webex Calling, help.webex article nbedetf, header January 14, 2026. The guide is Unified CM to Webex Calling multi-tenant only. Local Gateway is described as a bridge. PPDIO is Prepare, Plan, Design, Implement, Optimize.

15 · Re-engineer later

Open

  • Preferred Architecture PDFs named by the guide were not opened in this pass.

Sources and go deeper

Checked links were opened this month. A confirm row has no address because that page was not opened.

sources.json for this page.