Share numbering and call management
Use a distributed UCP and SIP interconnection to organize internal calls between sites.
Connect every office through a single voice network.
Connect headquarters, branches, and remote offices through a shared SIP voice architecture while preserving the local access each site still needs. Standardize dialing and inter-site calls, then extend the same operating model as sites are added.
The operational problem
Separate site systems multiply daily voice operations
Headquarters, branches, and remote buildings may each maintain their own numbering, call rules, trunk, and mix of equipment.
This fragmentation makes inter-site calls harder to standardize and requires every expansion to revisit the same design decisions. A shared voice model brings sites together without removing the local access each still needs.
Match each branch to the right UCP model
Use UCP1202, UCP1600, or UCP2120 according to the number of local users, processing, and service module requirements.
Reuse a single SIP branch model
Add offices through a defined relationship between UCP4131 at headquarters and the selected branch UCP.
Distributed architecture
Use the UCP model that fits each site while maintaining a single SIP voice network
UCP4131 provides the headquarters anchor, while UCP1202, UCP1600, and UCP2120 cover different branch scales via SIP interconnection and shared numbering.
Share numbering and call management
Organize internal calls between 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.
Maintain local access at every branch
Preserve the carrier and endpoint access each site still needs without changing the shared SIP plan.
- 01UCP4131 headquarters
Shared management, numbering, and SIP service anchor
- 02UCP1202 small branch
Compact local calling for small offices
- 03UCP1600 branch
More local users and service module capacity
- 04UCP2120 medium branch
Broader local access and call processing role
- 05SIP interconnection
A single internal and inter-site call plan
Site roles
Define what is shared and what stays local
A multisite design works when UCP4131 establishes the common call model and each branch uses the UCP chassis that matches its local scale and access requirements.
UCP4131 shared anchor
Coordinate management, dialing, and SIP interconnection across the organization.
Compact UCP1202 role
Provide local calling and a service module slot for a small office.
UCP1600 local platform
Support a larger branch with more local users and modular service capacity.
Extended UCP2120 role
Provide more service module capacity for a mid-size branch while retaining the shared SIP plan.
One organization, clear responsibilities at each site
UCP4131 anchors shared management and dialing. UCP1202, UCP1600, and UCP2120 handle local users while following the agreed inter-site call model.
Keep local trunk access explicit
Document the access each branch retains without turning 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 a site design into a repeatable branch
Inventory each location, define the shared call relationship, assign local access and continuity roles, then reuse the defined model for future sites.
Map the sites
Record users, endpoints, local trunks, and service module needs at each location.
Position headquarters
Use UCP4131 as the anchor for shared management, dialing, and SIP interconnection.
Size each branch
Select UCP1202, UCP1600, or UCP2120 according to local scale and access requirements.
Validate and expand
Test inter-site calling, local access, and recovery behavior before repeating the model.
Select an explicit UCP role for headquarters and each branch
UCP4131, UCP1202, UCP1600, and UCP2120 cover different site scales while remaining part of the same SIP interconnection and dialing plan.
One 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.
Compact branch deployment
The compact chassis supports a smaller user environment and a service card role.
Growing branch platform
The 1U model provides a larger modular branch role within the same UCP architecture.
Mid-size branch capacity
The 2U model provides two controller slots and expanded service module capacity.
Build a repeatable multisite voice plan
Share the headquarters and branch map, user accounts, local trunks, service module needs, internal calling requirements, and continuity priorities. OpenVox can help select the UCP role for each site.
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