CUCM to Webex Calling Migration Master Checklist¶

Abhavtech Enterprise Collaboration Transformation - Phase 1¶

On-Premises CUCM to Cloud Webex Calling | Multi-Region Deployment¶

Document Purpose¶

This master checklist provides a comprehensive roadmap for migrating from on-premises Cisco Unified Communications Manager (CUCM) to cloud-based Webex Calling. Use this as a sequential guide to ensure all critical discovery, design, implementation, and migration activities are completed for a successful enterprise voice transformation.

Target Architecture: - 12 Global Sites (7 India + 2 EMEA + 2 Americas + Remote Workers) - 3,200 Enterprise Users migrating to Webex Calling - Multi-Region PSTN Strategy: Local Gateway (India) + Cloud Connected PSTN (EMEA/Americas) - Integration: SD-WAN QoS (ABV-SDWAN-2024), DNA Center (ABV-SDA-ISE-2025) - Phase Dependency: Required for Phase 2 (UCCX to WxCC Migration)

Software & Platform Versions: - Webex Calling: Latest Cloud Platform (Auto-updated) - Current CUCM: 12.5(1)SU7 - Current Unity Connection: 12.5(1)SU4 - Local Gateway: Cisco CUBE IOS-XE 17.9.x - Webex App: Latest (Windows/Mac/Mobile)

Phase 1: Discovery & Current State Assessment¶

1.1 Infrastructure Inventory¶

Document CUCM cluster topology (Publisher + 4 Subscribers)
Inventory all CUCM servers (hostname, IP, version, roles)
Document Unity Connection deployment (HA pair)
Inventory UCCX contact center infrastructure (dependency check)
Document IM&P cluster architecture
Document Expressway C&E infrastructure (MRA)
Identify all CUBE SBC deployments
Document integration points (CRM, recording, billing)

1.2 User & Device Inventory¶

Export complete user inventory from CUCM (3,200 users)
Document user distribution across 12 sites
Inventory endpoint types (desk phones, Jabber, softphones)
Identify video endpoints and conference room systems
Document mobile and remote users
Identify executive assistants and admin support users
Document contact center agents (175 agents - Phase 2 dependency)
Create user-to-site mapping spreadsheet

1.3 PSTN & DID Inventory¶

Document PSTN connectivity per region (India, EMEA, Americas)
Inventory DID ranges per site
Document toll-free numbers (India 1800 series)
Identify emergency services configuration (E911/E112)
Document PSTN providers and contracts by region
Verify number portability eligibility
Document SIP trunk configurations
Identify geographical restrictions (India DoT/TRAI compliance)

1.4 Feature Utilization Analysis¶

1.5 Dial Plan Analysis¶

Document internal extension plan (4-digit, 5-digit)
Analyze route patterns and route lists
Document translation patterns
Inventory calling search spaces and partitions
Document forced authorization codes (FAC)
Analyze least cost routing rules
Document abbreviated dialing and speed dials
Identify dial plan complexities and overlaps

1.6 Call Flow & Dependencies¶

Map call flows for inbound calls per site
Document outbound call routing per region
Analyze hunt group dependencies
Document shared line dependencies
Identify integration dependencies (CTI, TAPI, JTAPI)
Document recording requirements by user group
Analyze call center agent call flows (UCCX dependency)
Map emergency call routing per site

1.7 Integration Assessment¶

Document CRM integration (CTI pop, click-to-dial)
Assess recording system integration (Verint, NICE)
Document directory integration (LDAP, Active Directory)
Analyze billing system integration
Document wallboard and real-time displays
Assess paging and overhead speaker integration
Identify analog integrations (fax, door phones)
Document third-party application dependencies

1.9 Compliance Requirements¶

Document India DoT/TRAI toll bypass requirements
Identify data residency requirements per region
Document GDPR compliance for EMEA users
Assess recording consent requirements by region
Document emergency services compliance (E911/E112)
Identify industry-specific compliance (PCI-DSS for contact center)
Document data retention policies
Assess cross-border data transfer requirements

1.10 Business Requirements¶

Define migration timeline and business constraints
Identify business-critical users and blackout dates
Document feature parity requirements
Define success criteria and KPIs
Establish rollback thresholds
Document training requirements
Define support model post-migration
Establish change management process

Phase 2: Webex Calling Architecture Design¶

2.1 Tenant & Organization Design¶

Design Webex organization structure
Plan Control Hub administrative model
Define delegated administration roles
Design multi-geo tenant strategy
Plan licensing allocation per user type
Document authentication strategy (SSO, directory sync)
Design domain verification approach
Plan user import methodology

2.2 Location Design¶

Create location hierarchy (12 sites)
Assign users to locations
Define location-specific settings per site
Plan calling behavior per location
Design location-based call routing
Document location timezone settings
Plan location-based emergency services
Design announcement language per location

2.3 PSTN Design - India (Local Gateway)¶

Design Local Gateway architecture for India sites
Plan CUBE placement (Mumbai + Chennai hubs)
Design SIP trunk configuration to Webex
Plan trunk groups per location
Design route groups and route lists
Document dial plan translation rules
Plan emergency call routing (E112)
Design toll bypass compliance (DoT/TRAI)
Plan failover and redundancy

2.4 PSTN Design - EMEA/Americas (Cloud Connected PSTN)¶

Select Cloud Connected PSTN provider per region
Design CCPP integration architecture
Plan DID assignment per location
Design inbound call routing
Plan outbound call routing and restrictions
Document emergency services configuration
Design international calling policies
Plan trunk capacity per location

2.5 Dial Plan Design¶

Design enterprise dial plan (extension length)
Plan site codes and location-based routing
Design internal extension assignment
Plan outbound dial permissions per user class
Design abbreviated dialing and speed dials
Plan international dialing format
Design emergency services dialing
Document dial plan migration approach

2.6 Calling Features Design¶

Design call queue replacement for hunt groups
Plan virtual line implementation for shared lines
Design call park alternatives (group paging)
Plan receptionist console solution
Design music on hold strategy
Plan call recording solution
Design voicemail replacement (Cloud Voicemail)
Plan executive assistant call handling

2.7 Integration Design¶

Design Webex Calling API integrations
Plan CRM connector implementation (CTI)
Design recording platform integration
Plan directory integration (Azure AD sync)
Design analytics and reporting platform
Plan presence integration with M365/Google Workspace
Design wallboard integration
Plan billing system integration

2.8 Coexistence Design¶

Design CUCM-Webex Calling coexistence architecture
Plan SIP trunk between CUCM and Webex Calling
Design dial plan during coexistence phase
Plan call routing between platforms
Design shared line behavior during migration
Plan hunt group behavior during migration
Document coexistence testing procedures
Design rollback strategy

2.9 Quality of Service Design¶

Design media QoS markings (DSCP values)
Plan signaling QoS markings
Integrate with SD-WAN QoS policies (ABV-SDWAN-2024)
Design Call Admission Control (CAC)
Plan bandwidth reservation per site
Document QoS testing procedures
Design network monitoring for voice quality
Plan troubleshooting tools and access

2.10 Security Design¶

Design authentication and authorization model
Plan MFA (Multi-Factor Authentication) rollout
Design call encryption strategy
Plan secure SIP trunk configuration (Local Gateway)
Design fraud prevention policies
Plan international calling restrictions
Document security compliance requirements
Design audit logging and retention

2.11 User Provisioning Design¶

Design automated user provisioning workflow
Plan directory sync approach (Azure AD, Okta)
Design user attribute mapping
Plan phone number assignment automation
Design user template structure
Plan bulk import methodology
Document manual exception process
Design de-provisioning workflow

2.12 Endpoint Design¶

Select target endpoint models (MPP firmware)
Design Webex App deployment strategy
Plan soft client vs. desk phone allocation
Design mobile app deployment
Plan video endpoint migration
Document device provisioning process
Design device replacement program
Plan endpoint licensing strategy

2.13 Emergency Services Design¶

Design E911/E112 configuration per region
Plan emergency location information database (ELIN)
Document emergency callback procedures
Design emergency notification workflow
Plan emergency services testing procedures
Document compliance with local regulations
Design emergency services for remote workers
Plan emergency services for mobile users

2.14 Monitoring & Analytics Design¶

Design Control Hub monitoring dashboards
Plan call quality analytics approach
Design capacity monitoring and alerting
Plan troubleshooting tools and access
Document KPI tracking methodology
Design user adoption dashboards
Plan performance baseline establishment
Document escalation procedures

2.15 Compliance & Data Residency¶

Document data center selection per region
Design data residency compliance (India, EMEA, US)
Plan call recording storage location
Document GDPR compliance measures (EMEA)
Design India DoT/TRAI compliance architecture
Plan cross-border data transfer controls
Document audit trail requirements
Design compliance reporting dashboards

Phase 3: Pre-Deployment Preparation¶

3.1 Webex Tenant Setup¶

Activate Webex organization
Complete domain verification
Configure SSO/SAML integration
Set up directory synchronization
Import initial user list (test batch)
Configure organization settings
Set up administrative roles
Configure security policies

3.2 Licensing Procurement¶

Procure Webex Calling licenses (3,200 users)
Procure Webex Suite licenses (if bundled)
Procure additional app licenses (Webex App)
Procure Local Gateway licenses (India)
Assign licenses to user accounts
Document license allocation per site
Configure license usage alerts
Set up license renewal tracking

3.4 Local Gateway Deployment (India)¶

Deploy CUBE servers (Mumbai + Chennai)
Configure SIP trunk to Webex Calling
Configure SIP trunk to PSTN provider
Configure dial plan translation rules
Configure emergency call routing
Configure toll bypass compliance
Test inbound/outbound call routing
Document Local Gateway configuration

3.5 Cloud Connected PSTN Setup (EMEA/Americas)¶

Engage CCPP provider (EMEA)
Engage CCPP provider (Americas)
Configure CCPP integration with Webex
Assign DIDs to locations
Configure inbound call routing
Configure outbound call permissions
Test emergency services routing
Validate international calling

3.6 Endpoint Preparation¶

Procure Multiplatform firmware (MPP) phones
Deploy Webex App to pilot users
Configure device templates in Control Hub
Set up device provisioning workflow
Test device registration and calling
Document endpoint deployment procedures
Create user guides and quick reference cards
Set up help desk support materials

3.7 Integration Development¶

Configure CRM connector (Salesforce, Dynamics)
Set up recording platform integration
Configure directory sync (Azure AD, Okta)
Deploy analytics and reporting platform
Configure billing system integration
Set up wallboard integration
Test all integrations end-to-end
Document integration support procedures

3.8 Coexistence Configuration¶

Configure SIP trunk from CUCM to Webex Calling
Configure route patterns for coexistence
Set up translation patterns
Configure calling search spaces for coexistence
Test call routing between platforms
Validate shared line behavior
Test hunt group behavior
Document coexistence troubleshooting

3.9 Training Materials Development¶

Create user training curriculum
Develop Webex App training materials
Create desk phone quick reference guides
Develop admin training materials
Create help desk training program
Record training videos and webinars
Set up training environment (sandbox tenant)
Schedule training sessions per migration batch

3.10 Testing & Validation¶

Phase 4: Migration Batch Planning¶

4.1 Migration Batch Strategy¶

4.2 Batch 1 Planning - IT Pilot (50 Users)¶

Select IT pilot users
Schedule pilot migration window
Prepare pilot user communication
Configure pilot user accounts in Webex
Assign pilot user phone numbers
Provision pilot user devices
Schedule pilot user training
Define pilot success criteria

4.3 Batch 2 Planning - Non-Critical Users (500 Users)¶

Identify non-critical business users
Schedule batch 2 migration window
Prepare batch 2 user communication
Configure batch 2 user accounts
Assign batch 2 phone numbers
Provision batch 2 devices
Schedule batch 2 training
Define batch 2 success criteria

4.4 Batch 3 Planning - Branch Sites (800 Users)¶

Identify branch site users (Bangalore, Delhi, Noida, Pune, Hyderabad)
Schedule batch 3 migration windows per site
Prepare batch 3 user communication
Configure batch 3 user accounts
Assign batch 3 phone numbers
Provision batch 3 devices
Schedule batch 3 training
Define batch 3 success criteria

4.5 Batch 4 Planning - Hub Sites (600 Users)¶

Identify hub site users (Chennai, London, Frankfurt, New Jersey, Dallas)
Schedule batch 4 migration windows per site
Prepare batch 4 user communication
Configure batch 4 user accounts
Assign batch 4 phone numbers
Provision batch 4 devices
Schedule batch 4 training
Define batch 4 success criteria

4.6 Batch 5 Planning - Contact Center Agents (175 Users)¶

4.7 Batch 6 Planning - Executive & Remaining Users (1,075 Users)¶

Identify executive and VIP users (Mumbai HQ)
Identify remaining users not in previous batches
Schedule batch 6 migration window (Final cutover)
Prepare batch 6 user communication
Configure batch 6 user accounts
Assign batch 6 phone numbers
Provision batch 6 devices
Schedule batch 6 training
Define batch 6 success criteria

4.8 Rollback Planning¶

Define rollback triggers per batch
Document rollback procedures
Test rollback process in lab environment
Prepare rollback communication templates
Assign rollback decision authority
Document rollback testing procedures
Define rollback time window per batch
Prepare rollback resource allocation

4.9 Communication Planning¶

Develop migration communication plan
Create user notification templates
Schedule pre-migration town halls
Prepare FAQs and support documentation
Set up migration status dashboards
Create help desk escalation procedures
Prepare executive briefing materials
Schedule post-migration feedback sessions

4.10 Support Planning¶

Define hypercare support model
Schedule 24/7 support coverage during migration
Set up war room for migration coordination
Prepare help desk scripts and call flows
Configure help desk ticketing system
Schedule vendor TAC engagement (Cisco)
Prepare on-site support resources
Define issue escalation procedures

Phase 5: Migration Execution¶

5.1 Batch 1 - IT Pilot Migration (50 Users)¶

5.2 Batch 2 - Non-Critical Users (500 Users)¶

5.3 Batch 3 - Branch Sites (800 Users)¶

5.4 Batch 4 - Hub Sites (600 Users)¶

5.5 Batch 5 - Contact Center Agents (175 Users)¶

5.6 Batch 6 - Executive & Remaining Users (1,075 Users)¶

5.7 Per-Batch Validation Checklist¶

Execute this checklist after each batch migration: - [ ] Verify all users in batch successfully migrated - [ ] Test inbound calls to all users - [ ] Test outbound calls from all users - [ ] Validate internal calling between platforms - [ ] Test voicemail functionality - [ ] Verify call recording (if applicable) - [ ] Test CRM integration (CTI pop) - [ ] Validate emergency services calling - [ ] Monitor call quality metrics - [ ] Resolve all P1/P2 issues - [ ] Collect user feedback - [ ] Update migration runbook with lessons learned - [ ] Obtain business sign-off before next batch

5.8 Issue Management¶

Establish issue tracking system
Define issue severity levels (P1/P2/P3/P4)
Create issue escalation matrix
Schedule daily issue review meetings
Document all issues and resolutions
Track issue trends and root causes
Implement preventive measures
Conduct lessons learned sessions

5.9 Go/No-Go Decision Points¶

Execute this checklist before each batch migration: - [ ] Previous batch stable for minimum duration - [ ] All prerequisites complete for current batch - [ ] Training completion >95% for current batch - [ ] Endpoint provisioning 100% complete - [ ] Network readiness validated - [ ] Integration testing passed - [ ] No open P1/P2 issues from previous batch - [ ] Business owner approval obtained - [ ] Support resources confirmed available - [ ] Rollback plan validated

5.10 Rollback Execution (If Required)¶

Phase 6: Post-Migration Optimization¶

6.1 Performance Monitoring (First 30 Days)¶

Monitor call quality metrics daily
Track call completion rates
Monitor call setup time
Analyze codec usage
Monitor bandwidth utilization
Track PSTN trunk utilization
Monitor emergency services calls
Generate daily performance reports

6.2 User Adoption¶

Monitor Webex App adoption rates
Track feature utilization (voicemail, call forwarding)
Analyze mobile app usage
Monitor video calling adoption
Track help desk ticket volume and trends
Conduct user satisfaction surveys
Identify additional training needs
Schedule follow-up training sessions

6.3 Integration Optimization¶

Monitor CRM integration performance
Optimize recording platform settings
Tune directory sync frequency
Optimize analytics and reporting
Fine-tune wallboard integration
Validate billing system accuracy
Monitor API usage and throttling
Document integration best practices

6.4 Cost Optimization¶

Analyze PSTN usage and costs
Optimize trunk capacity per site
Review licensing allocation
Identify unused licenses
Optimize calling policies to reduce costs
Review CCPP provider invoices
Analyze international calling costs
Generate cost savings report

6.5 Capacity Planning¶

Analyze trunk capacity utilization
Monitor concurrent call peaks
Assess bandwidth utilization trends
Plan for seasonal call volume increases
Identify capacity constraints
Plan trunk capacity upgrades (if needed)
Document capacity planning procedures
Schedule quarterly capacity reviews

6.6 Feature Enhancements¶

Identify additional features to enable
Plan executive assistant features rollout
Enable advanced call queue features
Activate Webex Calling analytics
Enable voicemail transcription
Activate call history search
Enable advanced dial plan features
Plan Webex Suite feature adoption

6.7 Security Hardening¶

Review and harden calling policies
Enable fraud detection alerts
Implement toll fraud prevention
Review international calling restrictions
Enable MFA for all admin accounts
Conduct security audit
Implement least privilege access
Schedule periodic security reviews

6.8 Documentation Updates¶

Update as-built documentation
Document final dial plan
Update network diagrams
Document all integrations
Update user guides and FAQs
Create admin runbooks
Document troubleshooting procedures
Archive migration project documentation

6.9 Knowledge Transfer¶

Conduct admin training for BAU team
Train help desk on common issues
Document operational procedures
Create troubleshooting decision trees
Schedule knowledge transfer sessions
Provide access to Control Hub
Document vendor escalation procedures
Complete knowledge transfer sign-off

6.10 Hypercare Transition¶

Transition from hypercare to BAU support
Reduce war room support hours
Establish regular support coverage
Define SLA for issue resolution
Establish change management process
Schedule weekly operations reviews
Document support escalation procedures
Close hypercare support activities

Phase 7: CUCM Decommissioning¶

7.1 CUCM Decommissioning Prerequisites¶

CRITICAL: Verify all 3,200 users successfully migrated
CRITICAL: Verify Phase 2 WxCC migration complete and stable
Confirm zero users remain on CUCM
Validate all PSTN trunks migrated or disconnected
Confirm all integrations migrated
Verify all phone numbers ported or assigned
Confirm all recordings migrated (if applicable)
Obtain business sign-off for decommissioning

7.2 CUCM Decommission Plan¶

Document current CUCM configuration (final backup)
Identify dependent systems (UCCX, Unity, IM&P)
Plan CUCM shutdown sequence
Coordinate with Phase 2: UCCX decommission after WxCC stable
Plan Unity Connection decommissioning
Plan IM&P decommissioning (if not migrated)
Plan Expressway decommissioning (if not needed)
Document rollback window and procedures

7.3 CUCM Shutdown Procedure¶

GATE: Minimum 30 days post-migration stability required
Final validation: Zero active registrations on CUCM
Disable auto-registration on CUCM
Disable TFTP services on CUCM
Disable SIP/SCCP services on CUCM
Shutdown CUCM subscriber nodes
Shutdown CUCM publisher node
Disconnect PSTN trunks from CUBE
Document shutdown completion

7.4 Dependent System Decommissioning¶

7.5 Hardware Disposition¶

Power down all CUCM servers
Power down Unity Connection servers
Power down IM&P servers
Remove servers from data center racks
Sanitize server hard drives (secure erase)
Return leased hardware to vendor
Dispose of owned hardware per IT policy
Update asset inventory

7.6 License Management¶

Return CUCM licenses to Cisco (if applicable)
Cancel CUCM SmartNet contracts
Cancel Unity Connection licenses
Cancel IM&P licenses
Cancel PSTN provider contracts (if migrated)
Document license cost savings
Update license inventory

7.7 Data Archival¶

Archive final CUCM configuration files
Archive CUCM CDR (Call Detail Records)
Archive Unity Connection voicemail data
Archive IM&P chat history (if required)
Archive all system logs
Document archival location and retention period
Verify archived data accessibility

7.8 Final Documentation¶

Create decommissioning completion report
Document lessons learned
Update network architecture diagrams
Update IT asset inventory
Archive project documentation
Obtain final sign-off from business owners
Close project formally

Phase 8: Steady-State Operations¶

8.1 Operational Dashboards¶

Configure Control Hub monitoring dashboards
Set up call quality analytics dashboards
Create capacity utilization dashboards
Configure user adoption dashboards
Set up PSTN trunk utilization monitoring
Create compliance monitoring dashboards
Configure security and fraud detection dashboards
Schedule regular dashboard reviews

8.2 Alerting & Notifications¶

Configure critical service alerts
Set up call quality degradation alerts
Configure trunk capacity threshold alerts
Set up emergency services failure alerts
Configure fraud detection alerts
Set up integration failure alerts
Configure license usage alerts
Test all alert notifications

8.3 Incident Management¶

Establish incident management process
Define incident severity levels
Create incident response procedures
Document escalation matrix
Set up on-call rotation
Define SLA for incident resolution
Conduct incident response drills
Track incident metrics (MTTR, MTBF)

8.4 Change Management¶

Establish change management process
Define change approval workflow
Create change request templates
Schedule maintenance windows
Document change procedures
Conduct post-change reviews
Track change success rate
Maintain change calendar

8.5 Capacity Management¶

Monitor trunk capacity utilization
Track concurrent call peaks
Analyze bandwidth utilization trends
Plan for business growth
Schedule capacity planning reviews
Document capacity expansion procedures
Forecast license requirements
Plan infrastructure scaling

8.6 Performance Management¶

Track call quality metrics (MOS, latency, jitter, packet loss)
Monitor call completion rates
Track call setup time
Analyze codec distribution
Monitor PSTN trunk performance
Track emergency services call success rate
Generate monthly performance reports
Conduct quarterly performance reviews

8.7 User Support¶

8.8 Compliance Monitoring¶

Monitor India DoT/TRAI toll bypass compliance
Validate emergency services functionality
Monitor call recording consent compliance
Track data residency compliance
Conduct periodic compliance audits
Generate compliance reports
Document compliance evidence
Schedule annual compliance reviews

8.9 Security Operations¶

8.10 Continuous Improvement¶

Collect user feedback regularly
Analyze support ticket trends
Identify process improvement opportunities
Evaluate new Webex features
Plan feature adoption roadmap
Optimize calling policies
Conduct quarterly operations reviews
Document best practices

Appendix: Critical Success Factors¶

Technical Requirements¶

All 3,200 users successfully migrated to Webex Calling
All PSTN connectivity operational (Local Gateway + CCPP)
Call quality metrics meet baseline (MOS >4.0)
All integrations functional (CRM, recording, directory)
Emergency services calling validated per region
Zero open P1/P2 issues post-migration
CUCM decommissioned successfully
Phase 2 WxCC dependency satisfied (Batch 5 agents stable)

Business Requirements¶

Zero unplanned business downtime during migration
User adoption >90% for Webex App
Help desk ticket volume <5% of user base
Cost savings targets achieved
Migration completed within timeline
Business owner sign-off obtained
User satisfaction score >80%
All compliance requirements met

Compliance Requirements¶

India DoT/TRAI toll bypass compliance validated
GDPR compliance validated (EMEA)
Emergency services compliance validated (all regions)
Call recording consent compliance validated
Data residency requirements met
Audit trail complete and accessible
Compliance reports generated
Annual compliance reviews scheduled

Risk Mitigation¶

Rollback procedures tested and documented
24/7 support coverage during migration
Vendor escalation paths established
All critical incidents documented
Lessons learned captured
Backup configurations preserved
Disaster recovery plan validated
Business continuity plan updated

Sign-Off¶

Project Completion Checklist¶

Approvals¶

Role	Name	Signature	Date
Project Manager
Collaboration Architect
Network Architect
Security Architect
IT Director
Operations Manager
Business Owner

Document Cross-Reference¶

Chapter	Document	Reference
Chapter 1	Discovery & Current State	Section 1.1 - 1.5
Chapter 2	Webex Calling Design	Section 2.1 - 2.6
Chapter 4	Security & Compliance	Section 4.1 - 4.6
Chapter 5	DNS & Network Architecture	Section 5.1 - 5.7
Chapter 6	Implementation & Deployment	Section 6.1 - 6.3
Chapter 7	Migration Execution	Section 7.1 - 7.4
Chapter 8	Operations & Day 2	Section 8.1 - 8.5
Appendices	Reference Materials	Appendix A - L

Project	Integration Point	Reference
ABV-SDWAN-2024	QoS and Media Routing	SD-WAN Master Checklist Phase 4
ABV-SDA-ISE-2025	Network Policy and SGT	DNAC-ISE Master Checklist Phase 5
ABV-COLLAB-MIG-2026-P2	WxCC Migration Dependency	UCCX-WxCC Master Checklist Phase 1

Phase 2 UCCX-to-WxCC Dependency¶

Dependency	Description	Checklist Reference
Batch 5 Completion	175 CC agents migrated to Webex Calling	Phase 5.5
48-Hour Stability	Mandatory stability before WxCC cutover	Phase 5.5 Post-Migration
Hard Gate	Phase 2 cannot start until Batch 5 stable	UCCX-WxCC Checklist Phase 1.1
No Parallel Operation	UCCX requires CUCM CTI connectivity	UCCX-WxCC Checklist Phase 1.1

Quick Reference: Phase Summary¶

Phase	Focus Area	Key Deliverables	Duration
1	Discovery & Assessment	Infrastructure inventory, feature analysis	2-3 weeks
2	Architecture Design	Webex Calling design, PSTN strategy, dial plan	3-4 weeks
3	Pre-Deployment	Tenant setup, licensing, network prep, Local Gateway	4-6 weeks
4	Batch Planning	6 migration batches defined, training materials	2-3 weeks
5	Migration Execution	All 6 batches migrated, 3,200 users on Webex	14-16 weeks
6	Post-Migration	Performance optimization, user adoption	4 weeks
7	CUCM Decommission	CUCM/Unity/IM&P shutdown, hardware disposition	2 weeks
8	Steady-State Operations	BAU handover, monitoring, continuous improvement	Ongoing

Quick Reference: Migration Batch Summary¶

Batch	Users	User Type	Timeline	Dependencies
Batch 1	50	IT Pilot	Week 1	None
Batch 2	500	Non-Critical Users	Week 3-4	Batch 1 stable 7 days
Batch 3	800	Branch Sites	Week 6-10 (1 branch/week)	Batch 2 stable 5 days
Batch 4	600	Hub Sites	Week 12-16 (1 hub/week)	Batch 3 stable 5 days
Batch 5	175	Contact Center Agents	Week 18	Batch 4 stable + Phase 2 WxCC ready
Batch 6	1,075	Executive & Remaining	Week 20-23	Batch 5 + Phase 2 WxCC stable

CRITICAL GATE: Batch 5 must achieve 48-hour stability before Phase 2 UCCX-to-WxCC migration can proceed.

Document Version: 1.0
Last Updated: January 2026
Organization: Abhavtech
Classification: Internal Use
Cross-Reference: UCCX-WxCC Master Checklist (Phase 2)

End of CUCM-to-Webex Calling Migration Checklist