I am implementing a communications system for a railway. Part of this involves providing telephones in the tunnels.
The customer's prefered solution is that the telephones autodial to a specific extension in the control room, terminating at a digital phone with extension keypads - the idea being that each tunnel telephone terminates at its own button on the phone (or extender).
The problem is - so far as I have been able to discover, the maximum number of buttons I can get is 40 (one Ergoline 340 phone with 2 DSS extenders) and I have more than 40 phones. There isn't room to have 2 phones, and a PC-based solution isn't going to fly
Has anybody come across ways of doing this - e.g. 3rd party phones with more buttons, some "hack" that allows more than 2 DSS units to be added, some other solution I hadn't thought of?
(oh, it's a Sopho 3000 system, btw)
The customer's prefered solution is that the telephones autodial to a specific extension in the control room, terminating at a digital phone with extension keypads - the idea being that each tunnel telephone terminates at its own button on the phone (or extender).
The problem is - so far as I have been able to discover, the maximum number of buttons I can get is 40 (one Ergoline 340 phone with 2 DSS extenders) and I have more than 40 phones. There isn't room to have 2 phones, and a PC-based solution isn't going to fly
Has anybody come across ways of doing this - e.g. 3rd party phones with more buttons, some "hack" that allows more than 2 DSS units to be added, some other solution I hadn't thought of?
(oh, it's a Sopho 3000 system, btw)