Share numbering and call management
Use distributed UCP and SIP interconnection to organize internal calling across locations.
Connect every office through one voice network.
Connect headquarters, branches and remote offices through a shared SIP voice architecture while preserving the local access each site still needs. Standardize numbering and inter-site calling, then extend the same operating model as locations are added.
The operational problem
Separate site systems multiply everyday voice operations.
Headquarters, branches and remote buildings may each maintain their own numbering, call rules, trunks and endpoint mix.
That fragmentation makes cross-site calling harder to standardize and forces every expansion to revisit the same design decisions. A shared voice model brings sites together without removing the local access each one still needs.
Match each branch to the right UCP model
Use UCP1202, UCP1600 or UCP2120 according to local users, processing and service-module requirements.
Reuse one SIP branch pattern
Add offices through a defined relationship between UCP4131 at headquarters and the selected branch UCP.
Distributed architecture
Use the UCP model that matches each site while keeping one SIP voice network.
UCP4131 provides the headquarters anchor, while UCP1202, UCP1600 and UCP2120 cover different branch scales through SIP interconnection and shared numbering.
- 01UCP4131 headquarters
Shared management, numbering and SIP service anchor
- 02UCP1202 small branch
Compact local calling for smaller offices
- 03UCP1600 branch
More local users and service-module capacity
- 04UCP2120 medium branch
Larger local access and call-processing role
- 05SIP interconnection
One internal dialing and site-to-site calling plan
Share numbering and call management
Organize internal calling across headquarters, branches and remote buildings.
Select the UCP model by site role
Match branch users, local processing and service-module requirements to the appropriate UCP chassis.
Keep local access at each branch
Preserve the carrier and endpoint access each location still needs without changing the shared SIP plan.
Site roles
Define what is shared and what remains local.
A multisite design works when UCP4131 establishes the common calling model and each branch uses the UCP chassis that matches its local scale and access requirements.
UCP4131 shared anchor
Coordinate management, numbering and SIP interconnection across the organization.
UCP1202 compact role
Provide local calling and one service-module slot for a smaller office.
UCP1600 local platform
Support a larger branch with more local users and modular service capacity.
UCP2120 expanded role
Provide more service-module capacity for a medium branch while keeping the shared SIP plan.
One organization, clear responsibilities at every site.
UCP4131 anchors shared management and numbering. UCP1202, UCP1600 and UCP2120 branches process local users while following the agreed inter-site calling model.
Keep local trunk access explicit
Document the access each branch retains without changing the selected UCP product into an unrelated gateway illustration.
Make internal calling consistent
UCP supports SIP interconnection and short dialing between headquarters and branch users.
Turn one site design into a repeatable branch.
Inventory each location, define the shared calling relationship, assign local access and continuity roles, then reuse the defined pattern for future sites.
Map sites
Record users, endpoints, local trunks and service-module needs at each location.
Place headquarters
Use UCP4131 as the shared management, numbering and SIP interconnection anchor.
Size each branch
Select UCP1202, UCP1600 or UCP2120 from local scale and access requirements.
Validate and expand
Test site-to-site calls, local access and recovery behavior before repeating the pattern.
Select one explicit UCP role for headquarters and every branch.
UCP4131, UCP1202, UCP1600 and UCP2120 cover different site scales while remaining part of one SIP interconnection and numbering plan.
Primary product
UCP4131
Headquarters calling and management core
View productRequired participant
UCP1202
Compact branch calling core for smaller offices
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UCP1600
Branch calling core for a larger local deployment
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UCP2120
Medium branch calling core with greater service-module capacity
View productOne UCP family for different site scales.
Final model selection follows user scale, service modules, local access and resilience requirements.
Headquarters capacity and protection
The 4U platform supports the broadest service-module and controller options in the UCP family.
Proof chips
- UCP4131
Compact branch deployment
The compact chassis supports a smaller user environment and one service-board role.
Proof chips
- UCP1202
Growing branch platform
The 1U model provides a larger modular branch role within the same UCP architecture.
Proof chips
- UCP1600
Medium branch capacity
The 2U model provides two controller slots and expanded service-module capacity.
Proof chips
- UCP2120
Build one repeatable multisite voice plan.
Share the headquarters and branch map, user counts, local trunks, service-module needs, internal dialing requirements and continuity priorities. OpenVox can help select the UCP role for each site.