We are a small business with 15 employees and are recently reviewing some offers to upgrade our old Panasonic PBX to a new one. We have 14 employees in our main branch and another employee in a remote branch. We have 2 very competitive offers from Avaya for IP Office 500 with 14 digital 5410 phones and 1 IP phone for the teleworker and the offer from Cisco includes 2811 router running Cisco Communications Manager Express (CME) with 15 IP phones model 7911. One of the things that bothers me with Avaya is that their solution is not pure IP and they don't support SIP phones (only SIP trunking). On the other hand, their solution seems to have more features than Cisco's (the free Phone Manager Lite software for example) and I heard they keep updating IP Office with new features in each version (version updates are also free).
I need some help making a decision here, please share your thoughts & experience...
Thanks in advance,