We are a Government Department that processes waste water. I have a wan that consists of 2 T1's each T1 is connected to two central but separate monitoring points waste water treatment plants. From these T1's there are 35 56K connections or pump stations. Each 56K connection has two DLCI's one to each T1. This was set up for redundancy due to the nature of our business, some of the 56K connections are monitored by one station and the rest by the second station this division is geographic in nature and is set up that if a line goes down each station could monitor all 35 56K locations if needed.
At 12 of these 56K locations (Pump Stations) I have standard phone service that we pay extra for a line in to the building. Our T1's and 56K's are now dedicated to monitor flows, pump operations, water levels through the use of PLC's. My Goal is to eliminate the twelve phone systems that are limited in their usage to once a day and at this time costly and install Voice Over IP on this system and install phones at all 35 56K locations. These phones do not have to be the type that connect to the outside world just to our monitoring stations that are set up to handle any emergency calls that may come to them. Each phone would have to have the ability to choose the monitoring station the caller would like to converse with.
That said, is all this possible without causing any signal loss from the monitoring system? Would special software be required?