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BT One Voice SIP trunking
Enables Voice over IP from a Public Switched Telephony Network (PSTN) and access to Unified Communications and Collaboration (UC&C) services
What is BT One Voice SIP trunking?
SIP (Session Initiation Protocol) is a service that enables you to use your PBX to take advantage of your investment in IP-enabled telephony. So you can use VoIP to make and receive calls from the Public Switched Telephony Network (PSTN), over your existing IP network. And get access to new audio, IM, presence and video capabilities beyond the enterprise.
Why now?
Organisations need to be more agile and better able to communicate quickly, easily and cost-effectively across multiple sites and with customers and partners. Rich functionality in BT One Voice SIP trunking can be used to quickly build out communications infrastructure that will save money and increase efficiency, wherever you are in the world.
How do you start?
Because BT One Voice SIP trunking is used to unify traditional voice networks with IP, it should be deployed where it can yield the biggest benefits – the points where a cost analysis reveals the fastest return or the biggest business benefits.
The benefits of BT One SIP trunking
Cost savings
Moving to Voice over IP means free on-network calls and significant savings and predictable costs on PSTN calls.
Integrate
Make and receive calls from the Public Switched Telephony Network (PSTN), over your existing IP network.
Consolidate
Multi-site organisations can centralise switchboards and encourage direct dialling to numbers that travel with users anywhere on the network.
Future-proof
Integrate legacy networks with new IP infrastructure and build a foundation for Unified Communications and Collaboration across your organisation.
Why BT?
- 1
Our local and global footprint facilitates highly competitive prices on local, national, mobile and international calls.
- 2
Our legacy is voice. We have decades of experience which means your voice services are always in the best hands.
- 3
Our BT One Voice SIP trunking capability delivers a suite of communication services that can be “switched on” when you want.
- 4
Our approach links old and next-generation services seamlessly to protect existing investments and get the most out of new ones.
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Our services are available to any business with any infrastructure because we facilitate multiple network access points including PSTN, ISDN and SIP.
- 6
Our end-to-end capability means that BT can be your trusted partner to future-proof all your communication needs.
Frequently Asked Questions – Answered
What is SIP?
Session Initiation Protocol (SIP) is a signalling standard which underpins a unified communication and collaboration network infrastructure. It can manage additional communications (other than voice) over the IP connection, such as instant messaging, application sharing, video, and presence etc. It is anticipated that SIP will ultimately replace the current H323 Voice over IP (VoIP) Protocol.
And SIP trunking?
SIP trunking is a service offered by an Internet Telephony Service Provider that enables you to use your PBX to take advantage of your investment in IP-enabled telephony. So you can use VoIP to make and receive calls from the Public Switched Telephony Network (PSTN), over your existing IP network. And get access to new audio, IM, presence and video capabilities beyond the enterprise. SIP trunking is set up as follows: secure access to a VPN managed by a communications provider’s SIP call server, with free “on-net” calls.
What are the core functions of One Voice SIP trunking?
- - Number porting. Carry your existing phone numbers across
- - Connectivity to the PSTN
- - Centralised PSTN access. You don’t need traditional voice circuits at every site
- - Direct Dial In (DDI) reservation and allocation
- - Directory listing