VoIP Migrations

Telecom infrastructure transformation with controlled risk

Migration challenges

Migrating from a traditional telephony infrastructure to a modernized VoIP architecture is a complex project that affects the entire organization. The SBC plays a central role in these migrations: it controls and adapts SIP flows between legacy and new environments, ensuring interoperability and service continuity throughout the transition.

Migration ProcessStructured 4-phase approach to VoIP migrationPHASE 1AuditInfrastructure reviewCapacity analysisRisk assessment2-4 weeksPHASE 2DesignArchitecture designSBC configurationSecurity planning3-6 weeksPHASE 3MigrationStaged rolloutTrunk migrationParallel running4-8 weeksPHASE 4ValidationQuality testingSecurity auditPerformance baseline2-3 weeksTypical timeline: 11-21 weeks depending on infrastructure complexity

Technical challenges

PBX to SIP migration

Replacing traditional PBX systems (TDM) with SIP solutions. Managing temporary coexistence between both environments, progressive migration of endpoints and trunks.

Multi-carrier integration

Simultaneous interconnection with multiple SIP carriers for redundancy, cost optimization and geographic coverage. Each carrier has its own signaling specifics.

Interoperability

Telephony equipment from different vendors implements the SIP protocol with variations. The SBC normalizes these differences and ensures compatibility between all systems.

Service continuity

Telephony is a critical service. Migration must be planned to minimize disruptions, with rollback mechanisms and validations at each stage.

Our approach

1

Audit

Complete inventory of existing infrastructure: equipment, trunks, numbering plan, communication flows, call volumes and operational constraints.

2

Design

Detailed target architecture: network topology, SBC selection, sizing, addressing plan, routing policies, high availability.

3

Migration

Progressive phased deployment: SBC installation, SIP trunk configuration, migration by site or user group, validation at each step.

4

Validation

End-to-end testing: voice quality, failover scenarios, performance under load, compliance. Knowledge transfer and complete documentation.

Migration scenarios

SIP Trunking

Replacing ISDN/PRI links with SIP trunks. Cost reduction, bandwidth flexibility and integration with unified communications platforms.

Multi-site centralization

Consolidating telephony from multiple sites to a centralized platform. Simplified administration, standardized configurations and economies of scale.

Cloud migration

Transition to SaaS communication solutions (UCaaS). The SBC ensures controlled interconnection between the enterprise network and the cloud platform.

VoIP Migration | Controlled Telecom Transformation | Bill-IT