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Session initiation protocol (SIP) trunking delivers access to and from the public switched telephone network (PSTN) over the Internet protocol (IP). A powerful tool, it harnesses rich multimedia communications over the Internet, and a SIP call can include voice, video, instant messaging, file sharing, gaming and data.

Enterprises use SIP trunking for cost-effective telephone service to their offices via a PBX or individual users remotely. It also enables the client to move existing number ranges to an out of area location. A major selling point of SIP is its support of ‘presence’ which revolutionizes the workplace by enabling colleagues to locate – via IP phones, mobiles, PCs/laptops – the willingness/ability of other users to communicate with them.

Clients with standard TDM PBX can, once connected to an IP based platform, get the full of benefits provided by SIP, their ability to do so not being compromised while they are in the process of changing from TDM PBX to IP PBX.

 

4sure Connection hosted IP trunking for IP PBX

Via SIP trunking to the 4sure Connection by a direct Connection to the IP PBX, your clients will enjoy lower communication call costs and basic disaster recovery call forwarding to mobiles. Enterprises with multi site locations also get free site to site calls, the best in service delivery and options to fast track all communications for enhanced productivity.

The use of IP PBXs now outweighs TDM PBXs, which means that the networks of many companies include sites that already use an IP PBX. In such cases, the site’s LAN connects to an IP wide area network. This potentially connects one IP PBX to another at a different site, thus already achieving partial Voice and Data convergence – but usually for inter-/intra-site calls only. Each IP PBX is still connected to the PSTN for all non site-to-site calls and inbound calls to that IP PBX which would be delivered over these same PSTN/ISDN lines.

This means that 4sure Connection IP PBX can connect to and integrate with a company’s existing IP network. The IP PBX forms part of the LAN environment and therefore already connects to the IP network. Trunks or channels, initiated on the VoIP platform enable the IP PBX to relay outbound calls over the IP network. The VoIP platform then directs each call based on its on-net or off-net destination. The IP router does not need to convert TDM to IP as the IP PBX already provides IP enabled calls.

In this way, 4sure Connection delivers next stage network convergence by directly connecting to the IP PBX and without impact on the LAN environment and associated phones. This means minimal disruption to your client’s business and an unaffected workforce. In fact - business as usual.

 

4sure Connection hosted IP trunking for TDM PBX

4sure will support your clients whether they aim to retain elements of their standard TDM PBX, gradually adopt, or totally adopt IP PBX. We adjust to your client’s timescale of change

In most business environments, there is a TDM PBX in place and also a traditional LAN environment connected to an IP network via a standard router. The TDM PBX is totally standalone and connected directly to a PSTN network by traditional PSTN/ISDN trunks. The good news for these clients is that having an existing in-situ TDM PBX or retaining the traditional TDM is cost-effective and efficient. Delivering all the basic telephony needs, it makes economical sense not to replace the PBX and once connected to an IP based platform, a host of network based features can be provided.

4sure Connect will install an intelligent enterprise gateway that allows the PBX to connect directly to the core IP network. This means that the existing PSTN/ISDN lines can be removed from the PBX, often with a few channels retained as back-up in the event of IP connection failure. All outbound calls made by the PBX are then routed directly via the enterprise gateway, converting TDM into SIP based IP protocol for the routing of calls and turning a traditional TDM call into a VoIP call. The VoIP platform determines whether a call is destined to remain on IP to be delivered to another site within the company’s VoIP VPN, or to the PSTN network gateway for further termination.

This enterprise gateway could also replace the standard IP router and with a single IP connection carry both data traffic from the LAN – and VoIP calls from the PBX – all via the one enterprise gateway that’s doubling as an IP router for data traffic and as a voice gateway. 4sure Connection doesn’t recommend this converged approach at this stage. Keeping voice and data separate ensure voice quality – even though VoIP calls will demand less bandwidth pr call than would be required on a traditional PSTN (TDM) network. A standard VoIP call will need just half the bandwidth of a traditional voice call, doubling bandwidth efficiency over traditional PSTN and ISDN circuit lines.