Populates cover page, revision history, and document header of all 5 HLD variants.
Customer
Document Control
Step 2
Deployment Model
This drives which sections appear and all design decisions. All 5 variants are fully supported.
Select Deployment Model *
☁️
MT Only
Webex Cloud Greenfield
🏢
DI Only
CUCM in Equinix CUCM parity
🔀
MT + On-Prem
Hybrid LGW bridges both
🔗
DI + On-Prem
Hybrid DI Phased migration
⚡
DI + MT
Mixed enterprise Unified via LGW
Step 3
Sites & Locations
Each site populates PSTN per-site table, E.911 ESA, number plan appendix, and network diagram.
Step 4
Current State (AS-IS)
Documents the existing telephony environment and justifies the migration.
Existing Platform
Network & Drivers
Step 5
PSTN & Trunk Design
Define PSTN strategy, trunks, and route groups. These feed the dial plan and HLD Sections 6–8.
PSTN Strategy
Trunks
Route Groups
Step 6
Local Gateway / CUBE
Section 7 — hardware platform, trunk type, HA, certificates, and SRST survivability design.
Platform & Trunk
HA & Certs
Step 7
Dial Plan Design
Section 8.2 — numbering, ESN, patterns, route groups, partitions/CSS. The most customer-specific section.
Numbering & Approach
Dial Patterns
Define key patterns — added to HLD Section 8.2 pattern table and flowchart.
Step 8
Licensing & Users
Drives the feature matrix (Section 11), capacity planning (Section 17), and bill of materials. Open full License Calculator ↗
⚠ Prices are indicative reference list prices only. Get a formal CCW quote before presenting to a customer.
Webex Calling MT
1 device OR softclient. VM, AA, Hunt, Park, Pickup, E.911.
Phone + softclient. BLF, Exec/EA, AI Assistant, CTI, SNR.
All Professional + queue supervisor, AI summaries, barge/whisper, queue recording.
Professional Calling + Webex Meetings + Messaging + Webinars.
Common area phones, ATA FXS/FXO ports, DECT handsets, meeting room devices.
PSTN Route List Calls (On-Prem CUCM)
Route List Calls license is needed when on-prem CUCM users access cloud CCP PSTN via Webex. DI subscribers: INCLUDED — no extra cost.
⚠ Community est. ~$2–4. Channel-confidential. SKU: A-FLEX-CALLING-RLC.
No Route List charge for DI subscribers.
MT Monthly
$0
Route List Licenses
0
+20% burst: 0
Route List Monthly
$0
Grand Total Monthly
$0
Annual: $0
Step 9
Features & Services
Each feature gets a dedicated sub-section in the HLD. AA, Hunt, Queue, Pickup, Park, SNR, Voice Portal, VM Groups, Paging, MOH, Exec/EA, DECT, Webex Meetings.