I have been looking into Lync's Enterprise Voice as a replacement for our current PBX, we pay for a E1 plan for all users as it is and upgrading this to an E4 will save us money in the long run since we will be cutting out the expensive phone bill.
Was just wondering if anyone on here has implemented this and if so did you run into any big problems.
Also our internet connection isn't the best, we get about 7mbps download speed. we only have about 15 users in the office at any given time, will this stop us going the Voip route.