Share numbering and call management
Use distributed UCP and SIP interconnection to organize internal calling across locations.
Connect every office through one voice network.
Give headquarters, branches and multi-building sites a shared calling model through distributed UCP, SIP interconnection and the local trunk access each location still requires.
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.
Keep the access each site needs
Retain analog, digital or cellular trunk roles where local infrastructure requires them.
Reuse a proven branch pattern
Add buildings or branches through a defined relationship between the shared core, local users and gateway access.
Distributed architecture
Central management does not require identical sites.
Distributed UCP and SIP interconnection provide the shared calling layer. Local gateways preserve site-specific phones, traditional systems and carrier access.
HeadquartersShared management, numbering and SIP services
Branch officeLocal users, extensions and analog access
Remote buildingLocal endpoints, PBX or digital trunks
Wireless accessCellular voice as primary or backup trunk
Site roles
Define what is shared and what remains local.
A multisite design works when headquarters establishes the common calling model and each branch keeps the users, endpoints and trunks required for local operation.
Shared voice fabric
One organization, clear responsibilities at every site.
Headquarters coordinates shared management and numbering. Branches and remote buildings connect local users while following the agreed inter-site calling model.
HeadquartersShared management, numbering and SIP interconnection
Branch officeLocal users, extensions and required carrier access
New or remote siteA repeatable UCP and gateway deployment pattern
Continuity pathModel-specific redundancy and optional trunk backup
Preserve local systems and trunks
Connect analog endpoints, traditional PBXs or carrier trunks through the appropriate analog or digital gateway role.
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, PBXs, endpoints, trunks and continuity needs at each location.
Define shared calling
Set the UCP, SIP interconnection, numbering and internal dialing relationship across the organization.
Assign local roles
Place analog, digital or cellular access where the site still depends on local endpoints or trunks.
Plan continuity and growth
Assess model-specific resilience, backup trunks and the pattern used when another site is added.
Combine a shared calling core with site-specific access.
UCP systems, analog gateways and cellular gateways take different responsibilities according to the organization-wide design and each location's local infrastructure.
iAG800
Flexible 2/4/8-port FXS/FXO gateway for connecting analog endpoints and PSTN lines to SIP networks.
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SWG-3008 G/L Series Wireless Gateway
8-channel GSM/LTE wireless gateway for connecting mobile voice and SMS services to SIP networks.
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UCP1600
Unified Communication Platform (UCP) is the ideal solution to integrate data, voice and video in one product for small and medium-sized enterprises, which can be used in scenarios such as government and enterprise call systems, commercial call centers, and dispatch center industries.
View productConnect offices while preserving local access.
Preserve numbers and user habits
An OpenVox customer needed a new office building to join the existing phone system without disrupting established numbering and calling behavior.
Proof chips
- REQUIREMENT
UCP systems linked through SIP
OpenVox UCP systems in the old and new buildings were interconnected through SIP for unified numbering and internal calling.
Proof chips
- INTERCONNECT
Analog phones and trunks retained
MAG2000 analog gateways connected workstation phones, while digital and wireless trunk roles supported local external calling and backup design.
Proof chips
- LOCAL ACCESS
One internal calling experience
The two buildings operated with a shared numbering experience instead of requiring employees to learn a separate internal calling model.
Proof chips
- RESULT
Build one repeatable multisite voice plan.
Share the headquarters and branch map, user counts, current PBXs, local trunks, internal dialing requirements and continuity priorities. OpenVox can help define the shared core and site gateway roles.