There are 3 primary reasons. The first being cost saving. Since business usually has network link between offices, adoption of VoIP PBX significantly lowers inter office communication charges. The second being “Business Flexibility”. E.g. virtual call centre routing calls between sites. The is evident by call centres transferring operation to other countries for more cost efficient operation. The third being extension of call centres to smaller branches. Enhanced Services & Applications to the desktop (Web enabled Contact Center, Unified Messaging).
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