Multiple communication networks exist as entirely separate entities, each serving a particular application. The standard public switched telephone network (PSTN) time-division multiplexing (TDM) network assists the voice application; the internet and intranets serve data communications.
Business necessities typically force these networks to interoperate. As a consequence, deploying multiservice (data, voice, and video) applications like unified messaging or web-based customer contact centres needs overpriced and complicated links between proprietary systems, like personal branch exchanges (PBXs) and standards-based data networks.
The traditional enterprise communication takes place on 2 separate networks:
Over time, the internet (and data networking technology in general) encompassed the standard traffic varieties. This convergence recently began to absorb voice and video as applications into the data network. Many large Post, Telephone, and Telegraph (PTT) carriers use packet switching or voice over ATM as their backbone technology, and enterprise customers settle for virtual trunking or connecting their disparate PBXs via their wide-area data network to bypass long-distance charges.
By joining these antecedently disparate networks into one unified network, you’ll be able to begin to understand savings in multiple areas, together with the lower total value of possession, toll savings, and inflated productivity.
Cisco CallManager and Cisco IP Phones allow an IP telephony resolution that operates on an IP infrastructure. The clustering design of Cisco CallManager permits you to scale to an extremely available voice-over-IP (VoIP) network.