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What is SIP trunking? How it works and what you need to know.

What is SIP trunking?

What is SIP trunking? Let’s start by defining the acronym. 

SIP stands for Session Initiation Protocol

‘Trunking’ in SIP trunking means combining several phone lines or channels into one big connection which makes it easier and more efficient to handle lots of calls or data at once.

SIP trunking is a way of making calls and other communications (video, messaging etc) over an internet connection rather than using traditional lines. 

Historically, using the old analogue system, physical lines would connect the PBX (private branch exchange) to the PSTN (public switched telephone network).

With SIP trunking, you can connect the PBX to the cloud instead of directly to the PSTN. Making SIP trunking a good modern alternative to replace the old system. With traditional phone lines set to retire in 2025, SIP is one of the replacements available for those who still need to switch to a digital solution for their phone system. 

Who provides SIP?

Just like with traditional phone line providers, a good, reputable provider will be able to offer you a SIP trunking solution, especially if you’re looking to switch to digital as we edge closer to 2025. 

SIP lets you establish virtual connections for voice over IP (VoIP) communications, such as our cloud-based phone system, eve

What are the benefits of SIP?

Cost-effective – reduced costs compared to traditional telephone services, because you can use existing internet connections. 

Scalable – the ability to scale based on business needs, which is ideal if your business has fluctuating call volumes. 

International connectivity – allows businesses to establish virtual phone numbers globally. 

Redundancy and reliability – high reliability for uninterrupted communication services. 

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