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BT Global SIP
London, United Kingdom
What it is
BT Global SIP provides VoIP connectivity between an on-premises phone system and the public switched telephone network. Depending on country, it can replace PSTN/ISDN service fully or provide outbound calling without a full replacement. Supported calling includes inbound PSTN traffic, local, regional, and national outbound calls, emergency calls, number porting, and DDI reservation and allocation. BT describes integration with Microsoft Teams, Zoom Meetings, and Cisco Webex. Availability varies: Global SIP Outbound is stated as available in 73 countries, while full PSTN replacement is available in 24. A cloud self-service portal provides round-the-clock access to order, provision, and manage the service, with changes applied in real time; BT says the portal has no charge. BT also describes end-to-end security, fraud prevention, and monitoring. Its service schedule states that Global SIP is not PCI DSS compliant and should not carry payment card traffic. Pricing is available on request, with charges specified in the customer order.
For and against
For
- Full or outbound-only service options
- Emergency calling and number porting
- Integrates with Teams, Zoom, and Webex
- 24/7 self-service management portal
- End-to-end security described
Against
- Pricing requires a request
- Coverage differs by country
- Not PCI DSS compliant
- Payment card traffic should not use it
The verdict
BT Global SIP offers configurable PSTN connectivity, collaboration integrations, and real-time portal management. Organizations must confirm country availability and avoid using the service for payment card traffic.
Who it suits
Global SIP suits organizations consolidating voice and data networks or connecting collaboration platforms to telephony. It is aimed at global organizations needing PSTN connectivity and related calling functions.
Plans and prices
BT Global SIP
Flexible pricing structures; charges specified in the customer order
Read 7 Oct 2026 · globalservices.bt.com
On the record
- Calling features
- The product supports inbound PSTN traffic, outbound local, regional and national calls, emergency calls, number porting, and DDI reservation and allocation.globalservices.bt.com · read 7 Oct 2026
- Compliance limitation
- BT's service schedule states that Global SIP is not PCI DSS compliant and should not be used for payment card traffic.business.bt.com · read 7 Oct 2026
- Coverage
- BT states that Global SIP Outbound is available in 73 countries and full PSTN replacement is available in 24 countries.globalservices.bt.com · read 7 Oct 2026
- Integrations
- BT describes integration with Microsoft Teams, Zoom Meetings and Cisco Webex.international.bt.com · read 7 Oct 2026
- Intended customers
- BT describes Global SIP as a service for global organisations seeking to consolidate voice and data networks and connect collaboration platforms.international.bt.com · read 7 Oct 2026
- Management portal
- The cloud-based self-service portal provides 24/7 access to order, provision and manage Global SIP, with changes taking effect in real time.globalservices.bt.com · read 7 Oct 2026
- Portal charge
- BT states that the Global Voice self-service portal has no charge.globalservices.bt.com · read 7 Oct 2026
- Purpose
- Global SIP provides VoIP connectivity between an on-premises phone system and the public switched telephone network.business.bt.com · read 7 Oct 2026
- Security
- BT describes end-to-end security, fraud prevention and monitoring across its voice solutions.international.bt.com · read 7 Oct 2026
- Service options
- Depending on the country, the service is available as full PSTN/ISDN replacement or as outbound voice service without full replacement.business.bt.com · read 7 Oct 2026
- Support and sales
- BT invites prospective customers to contact a specialist for information about the service and its pricing.globalservices.bt.com · read 7 Oct 2026
