If you don't have a PBX in your organisation or you have more than one site that work together then Horizon Hosted Telephony over an Internet connection is ideal for you.
Cloud Hosted Telephony is ideal for organisations with multiple sites or for flexible working, improving interoperability between your mobiles and your fixed telephones while saving you money with extremely competitive on-net rates over a business grade network. The service is provided centrally so you don't need an expensive system on each site. Horizon connects branch offices together with calls free between locations and mobiles and everyone shares the same dial plans and directories.
Businesses with employees who are regularly on the move or out of the office will never lose calls as each user can simply tell the system, at the click of a mouse, where their calls should be sent: their desk, their mobile (or both) or their colleague. And if they miss a call they can pick up their voicemail no matter where they are.
In the event of a disaster the services can be instantly moved across to a backup plan that can include, for example, diverting calls to different locations without loss of functionality and without expensive call forwarding costs.