IP Telephony


What is IP Telephony?

IP Telephony is a way of making a phone system digital to take advantage of the internet and any hardware or applications attached to it. The main aim of IP Telephony is to increase productivity. VoIP is simply a digital transport vehicle for phone calls. Hence, IP Telephony is the overall experience of communicating effectively and reliably using internet protocols; this being achieved by harnessing the power of VoIP by virtue of the latter’s user-friendly features.

IP telephony provides a way to extend highly secure, reliable, and consistent communications services to all your employees whether they are in main HO location, at branch offices, working remotely, or are mobile. IP telephony transmits voice communications over the network using open-standards-based Internet Protocol.
Using the network as the platform, IP telephony solutions help organizations of all sizes realize greater security, resilience, and scalability in addition to the inherent benefits of using a converged network for transport and interconnection.

Use cases of IP telephony solutions include to:

  1. Provide highly secure, reliable, scalable communications that take advantage of your LAN and WAN
  2. Improve employee agility and productivity through integration with innovative Cisco Unified Communications and third-party applications.

IP telephony solutions comprise two categories:

Call processing
The call processing systems provide voice, video, mobility, and presence services to IP phones, media processing devices, VoIP gateways, mobile devices, and multimedia applications.

IP Phones
a. Wired
b. Wireless
c. Softphones

IP phones are available in wired and wireless versions and provide handset functionality for users.   Softphones are also available to extend voice and multimedia functionality to clients which run on computers.

IP telephony products support a wide range of Session Initiation Protocol (SIP)-based capabilities including:

  • Support for presence-based applications
  • Support for IP phones with enhanced SIP feature support
  • Support for third-party SIP-based phones
  • SIP trunking
  • Session Border Control
  • Simplified administration and maintenance

Why IP Telephony?

Cost Savings

IP networks can be significantly less expensive to operate and maintain than traditional networks. The simplified network infrastructure of an Internet Telephony solution cuts costs by connecting IP telephones over your LAN and eliminates the need for dual cabling.

Portability & Flexibility

Employees can be more productive because they are no longer confined by geographic location.

IP telephones work anywhere on the network, even over a remote connection.


IP Telephony is supported over a wide variety of transport technologies.
A user can gain access to just about any business system through a Digital Line or a LAN.


A future-proof, flexible, and safe solution, combined with high reliability, allows a company to focus on customer needs, not network problems.