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What are the most important features of an IP PBX, from the system integrators' point of view?
Basic features, that every IP PBX has, are out of the question. I'm also referring to the needs of the VoIP services providers. What kind of IP PBX do they choose for their clients? Do they decide on a customizable solution every time?
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3 Answers
Open Standards! Number one. There is no reason to be investing in proprietary solutons today, unless you are still using IBM 3274 terminals in your business. Complete integration to SIP for trunks, phones, ancillary equipment.
Scaleable solution - that is not obsolete in 5 years.
Thank you for responding!
And what about on how many BRI or FXS it can provide to interwork?
Do you think this is an important factor when choosing an IP PBX?
In the US, BRI is a non-issue, as it is not deployed to the extent as it is in Europe and other areas.
With regards to FXS - if the PBX adheres to Open Standards, there are plenty of open standards based Gateways that can be added to the system. I can add 2, 4, 8, or 12 FXS ports easily.
Can you think of a sweeter installation that two servers, that represent a High Availability Core PBX, able to take SIP trunks natively because of a build in Session Border Controller, or allows you to add as many FXO or FXS gateways as needed to support analog trunks and stations, etc.
A system that will scale to thousands of extensions with no problem.
Telephones can be one of several different makes that adhere to open standards - Polycom, snom, Grandstream, LG-Nortel, and more. Others, adhere to some of the standards and get particial interoperability - Avaya, Cisco, Mitel, etc.
THis is what all PBX manufacturers should be working towards, rather than trying to protect their legacy and proprietary systems. These will go to waste just like the old Mainframe Computers of yesterday. In five years, will you be glowing in the success of your open standards based system, or trying to explain why your legacy system is requiring another upgrade at the cost of a new system - Again.
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