PBX Migration towards VoIP

PBX Migration towards VoIP

Many companies own a quite powerful legacy PBX infrastructure with long-term service
agreements and a defined period for capex depreciation. Therefor, it is uneconomic to put it
out-of-service and replace it by new IP-PBX equipment. In many cases, IP-PBXs are used to
complement an existing PBX, also known as "PBX migration towards VoIP".
A gateway is used to connect the local area network to the existing internal telephone
network. Step by step, different departments are equipped with IP-PBXs as a subset of the
existing switchboard and with IP phones instead of standard terminals. Branch offices and
home offices can be integrated easily using IP-dial-in access to the company' s network.
As IP telephony is accepted by the users, new extensions are activated directly within the IPPBX.
Step by step, the legacy PBX can be replaced totally by the IP-PBX using teh
company's experience with the new technology and with copeing network load problems or
system break-down periods.

PBX Migration towards VoIP