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MAC costs in legacy PBX vs. IP telephony environments

What are some examples of actual MAC (moves, adds and changes) costs in legacy PBX environments versus IP telephony?

What are some examples of actual MAC (moves, adds and changes) costs in legacy PBX environments versus IP telephony?
The savings are quantifiable in three ways: ability to manage your own IP-PBX; savings on calling configurations that in a legacy, key-based PBX would have required service-provider contracts; as well as the economic benefits of cheaper calling via IP telephony vs. traditional long distance.

The traditional MAC savings generally are calculated on the basis of $100 for each calling change saved for larger...

businesses and $50 for each change for smaller businesses. These changes can be addition or deletion of new employees, alteration of access privileges (such as when a probationary employee becomes a permanent one) or other modifications such as a changed voicemail greeting, call forwarding, automatic call notification, the addition or revision of other contact phone numbers and e-mail addresses for employees.

Because most IP-PBXs allow configuration for multiparty (more than three parties) calling, third-party bridging services will be required less, if at all. Traditional bridging services can cost 40 cents or more per minute per line. A single, one-hour, 50-participant call can easily reach $1,000. Some service providers also insist on a 24-hour notification -- not practical for businesses with sudden, ad-hoc conferencing needs. With IP-PBX, the cost of that conference bridge is absorbed with just a few such sessions.

And, of course, there are savings on long-distance charges! A good VoIP plan should reduce your calling fees by at least half, and often more.

I often discuss these IP telephony ROI specifics in my What Works at Work features for Von (Voice Over Net) Magazine.

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