British Telecom Targets 2025 for Total SIP Infrastructure Deployment

British Telecom (BT) recently announced the goal of retiring its ISDN (integrated services digital network) infrastructure and migrating all its customers to SIP (session initiation protocol) trunking by 2025. This move demonstrates the continued rapid acceptance and deployment of SIP trunking. Verizon announced four years ago that it would stop taking orders for ISDN service in the northeastern US. Germany will phase out all ISDN lines by next year. The market continues to grow and is expected to reach 43 million SIP trunks and $8.5 billion in revenue by 2019.

ISDN is still a reliable technology but does not offer the robust capabilities of SIP. SIP is the combination of VoIP and streaming media which enables the seamless consolidation of voice, video and data. Companies benefit by reducing costs and gain the agility to deploy new applications. Unified communications on one pipe is much easier to manage.

BT is joining other European providers like Telefonica, Deutsche Telecom and Telestra. In the US, providers such as AT&T, Level 3, Verizon, XO and CenturyLink have emerged as the dominant players. The installed base is being concentrated among the larger operators who can provide scale and reduced costs which is critical for business success. The proliferation of SIP continues as more providers continue to adopt SIP, with its simplified architecture.

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