On-Premise Phone System

On-premise PBX is also known as an IP-PBX phone system. It is similar to a traditional PBX system because it is installed at the business locations, usually in a computer equipment room or phone closet.

The signaling is done with an IP phone to the IP-PBX server using a LAN. Calls can go through a traditional phone company as well as voice over Internet (VoIP) using SIP trunking. Gateway cards are used to connect the system to the traditional phone company provider. The provider can be the one that already provides service, though a SIP trunk can be configured for use with an Internet service telephone provider (ISTP).

Businesses that benefit from PBX

Benefits Of On-Premise Phone System
  •  Call management via call blocking, call forwarding, call logging, call transfer, and call waiting.
  •  Streamlined customer experience with call recording, voicemail, IVR (Interactive Voice Response) and DID (Direct Inward Dialing). Custom greetings, welcome messages, and hold music are other useful customer-facing features often included with a PBX.
  • Internal communications via conference calls and internal extensions.
  • Economical in the long run. There’s no risk of a fee increase, and once you own the equipment, you own it for good
  • Easy Expansion once the telephone system is in place. it will be relatively easy to scale it up as your company grows
  • Total Control of your assets without relying on a service provider. You and your IT team have total authority over every detail.


The Avaya communications system is the ideal solution for small organizations who are looking for basic calling functionality out of the box, with room for expansion and advanced calling solutions in the future. Through the use of upgrade modules, the Avaya system offers investment protection that will ensure that your business telephone system remains relevant in the years to come.

Compatible Phone Systems