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SPECIFICTION
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BT Global SIP

international.bt.com

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Spec score 7.2 #15 of 27 in SIP Trunking Providers

What it is

BT Global SIP provides VoIP connectivity between an on-premises phone system and the public switched telephone network. Depending on the country, it can replace PSTN/ISDN service completely or provide outbound voice without a full replacement. Features include inbound PSTN traffic, local, regional and national outbound calls, emergency calling, number porting, and DDI reservation and allocation. BT describes integrations with Microsoft Teams, Zoom Meetings, and Cisco Webex. Global SIP Outbound is stated to be available in 73 countries, while full PSTN replacement is available in 24. A cloud self-service portal offers 24/7 ordering, provisioning, and management, with changes taking effect in real time; BT says portal access has no charge. BT also describes end-to-end security, fraud prevention, and monitoring. Its service schedule says Global SIP is not PCI DSS compliant and should not carry payment-card traffic. Pricing is on request, with charges specified in the customer order.

Spec sheet

Purpose
Global SIP provides VoIP connectivity between an on-premises phone system and the public switched telephone network.Read 7 Oct 2026 · business.bt.com
Integrations
BT describes integration with Microsoft Teams, Zoom Meetings and Cisco Webex.Read 7 Oct 2026 · international.bt.com
Security
BT describes end-to-end security, fraud prevention and monitoring across its voice solutions.Read 7 Oct 2026 · international.bt.com
Headquarters
London, United KingdomRead 28 Sep 2026 · international.bt.com
Founded
1846Read 28 Sep 2026 · international.bt.com
Calling features
The product supports inbound PSTN traffic, outbound local, regional and national calls, emergency calls, number porting, and DDI reservation and allocation.Read 7 Oct 2026 · globalservices.bt.com
Compliance limitation
BT's service schedule states that Global SIP is not PCI DSS compliant and should not be used for payment card traffic.Read 7 Oct 2026 · business.bt.com
Coverage
BT states that Global SIP Outbound is available in 73 countries and full PSTN replacement is available in 24 countries.Read 7 Oct 2026 · globalservices.bt.com
Intended customers
BT describes Global SIP as a service for global organisations seeking to consolidate voice and data networks and connect collaboration platforms.Read 7 Oct 2026 · international.bt.com
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.Read 7 Oct 2026 · globalservices.bt.com
Portal charge
BT states that the Global Voice self-service portal has no charge.Read 7 Oct 2026 · globalservices.bt.com
Service options
Depending on the country, the service is available as full PSTN/ISDN replacement or as outbound voice service without full replacement.Read 7 Oct 2026 · business.bt.com
Support and sales
BT invites prospective customers to contact a specialist for information about the service and its pricing.Read 7 Oct 2026 · globalservices.bt.com

Plans and prices

BT Global SIP Priced on request Flexible pricing structures; charges specified in the customer order Read 7 Oct 2026 · globalservices.bt.com

Every BT Global SIP plan and price →

Strong points and limits

Strong points

  • Inbound and outbound PSTN calling
  • Emergency calls supported
  • Number porting and DDI allocation
  • Integrates with Teams, Zoom, and Webex
  • 24/7 self-service management portal

Limits

  • Pricing available only on request
  • Availability varies by country
  • Not PCI DSS compliant
  • Full replacement listed in 24 countries

Who it suits

BT describes Global SIP for global organisations consolidating voice and data networks and connecting collaboration platforms. It suits organisations needing PSTN connectivity, emergency calling, and country-dependent replacement or outbound service.

Verdict

BT Global SIP combines on-premises telephony connectivity with calling, porting, emergency, and collaboration-platform options. Country coverage and replacement choices vary, and the service must not be used for payment-card traffic.

Where Specifiction places it

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