SIP TRUNKS

SIP Trunking provides a more flexible, scalable and lower cost alternative to traditional ISDN for both Inbound and Outbound business voice calls and VoIP.

What is a SIP phone system?

SIP Trunking (or SIP) is a public IP Telephony Service that’s based on session initiated protocol lines. By merging both voice and data, SIP provides a more economical option for many organisations. SIP is delivered over the same data lines used for internet and Wide Area Network (WAN) connections within your organisation.

By merging voice as an additional application on these data lines, the existing ISDN lines are no longer needed. SIP enables all internal calls to stay inside the company’s WAN, avoiding handoffs by the Telecom Provider; call charges for traversing to the PSTN. Due to this, SIP can reduce your rental and call charges dramatically.

The 5 main benefits of SIP Trunking

The difference between SIP and Hosted Telecoms

SIP is best suited to larger SMEs and mid-market organisations to ensure they can benefit from the increased flexibility and security provided by SIP Trunking that a Hosted Telephony solution cannot offer. When you compare SIP to ISDN it often works out cheaper on a per channel basis, it’s more flexible in terms of what telephone numbers you can have and where you can have them and is quicker to install.

Another advantage of SIP is that it also provides a very robust business continuity service to ensure your business never loses calls. Calls can automatically fail over to backup analogue lines connected to your system, or to mobile devices. Unlike ISDN, DDI’s can be forwarded to different destinations at network level. They can also be configured (depending on your PBX) to failover to a secondary internet connection.

Comparing SIP to ISDN – Why make the switch?

Infinity Group - Comparing SIP to IDSN

SIP is perfect for multisite businesses

For larger multisite organisations such as hotels, shops or organisations with many offices, we can usually replace the ISDN lines at multiple locations with one centralised SIP Trunk – saving costs.

Is it easy to switch to SIP Trunking?

Any organisation with a VoIP enabled private telephone network (PBX) setup can easily switch over to our SIP Trunking and benefit from a cost effective and more resilient telephone service. If your organisation doesn’t have a VoIP enabled PBX then you might want to consider switching to Horizon our Hosted Telecoms solution instead.

What’s a SIP Gateway?

A SIP Gateway connects to your internet modem and relays data that it reads from your telephone system, computer software, and various devices such as microphones and webcams. A SIP Gateway is often required for an office to use advanced features such as conference calls, video conferences, phone line extensions, individual voicemail boxes, and other networking features that common VoIP programs provide.

We look forward to discussing your SIP requirements in more detail. 

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