Centralized calling and policy
Coordinate branch numbering, routing and external access from the headquarters plan.
Keep every financial branch connected through disruption.
Unify headquarters and branch calling under one resilient voice plan, with secure inter-site connectivity and defined backup paths that help teams stay reachable when a primary service is disrupted.
The continuity challenge
Keep local service available without fragmenting the branch network.
Every branch depends on central coordination, local reachability and a clear response when its primary voice path is interrupted.
The architecture makes each layer visible: centralized calling, high-availability controls at headquarters, encrypted inter-site connectivity, local SIP and analog endpoints, and LTE backup at every branch.
Mixed local endpoints
Keep SIP and analog phones available through the branch voice platform.
Encrypted inter-site calling
Carry calls between headquarters and branches across the approved VPN/SIP network.
LTE continuity at the branch
Define which calls move to LTE and how the primary service is restored.
Branch continuity architecture
Connect headquarters and branches through a secure, layered voice architecture.
A central SIP service reaches high-availability call control at headquarters, which connects each branch over encrypted VPN/SIP while keeping local SIP and analog phones and an LTE backup path in the operating plan.
- 01Central SIP service
Shared external voice access
- 02Headquarters voice core
High availability, dual power and protected storage
- 03Encrypted branch network
VPN/SIP connectivity between sites
- 04Branch voice sites
Local SIP and analog phones
- 05LTE backup
Defined alternate access at each branch
Coordinate the estate from headquarters
Keep shared calling policy and external SIP access visible across all branches.
Secure the inter-site path
Use encrypted connectivity between headquarters and every branch voice site.
Define the backup behavior
Document when LTE takes over and which branch calls remain available.
Build the network around central control, local voice and backup access.
Product selection follows branch scale, endpoint mix, headquarters resilience requirements and the approved LTE continuity plan.
Make every continuity layer visible and testable.
Availability depends on the selected core, connectivity and backup design; it is verified against the agreed branch call plan.
Secure branch interconnection
Headquarters and branch voice sites communicate over encrypted VPN/SIP paths.
Proof chips
- NETWORK
Central calling policy
Shared numbering, routing and permissions keep the branch estate coordinated.
Proof chips
- CONTROL
Headquarters resilience
High availability, dual power and protected storage support the central voice role shown.
Proof chips
- CORE
Branch LTE continuity
Each branch receives a defined alternate access role and restoration test.
Proof chips
- BACKUP
Define one continuity plan for every financial branch.
Share branch count, endpoint mix, headquarters requirements, primary connectivity and the calls that must survive an outage. OpenVox can map the secure primary and LTE backup design.