Once again to throw a fly in the ointment, I would look at a pure voip system, 25 to 40 users you could go with either an Allworx or even better a Zultys, the advantage of the Zultys is that you get the bow/switch with all the hardware insatlled and everything else is done through licensing so you tailor the system specifically to individuals needs and requirements. We also sell the ESI and have only good things to say about them, but as Coral said .....applications babee!!!

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