"What does a craft workshop need a PBX for? Probably to ensure the same thing that everyone wants: to be contactable any time, anywhere, to hear from the ringtone whether it is a private or business call, answering machine at least for the foremen, etc. You would have to ask my secretary if there's anything else I've missed that it can do. All I know is that she is absolutely thrilled with her desk phone with lots of keys and a large colour display (COMfortel 2600 IP with Xtension300). We now have eight cordless telephones (COMfortel M-510) at the start that vibrate and flash when there is an incoming call – this is recognisable everywhere, even if a saw is being used nearby. However, the engineer who set up the system (COMpact 5200) was something of an experimenter. He connected a motion detector to our door terminal system and knew a trick enabling us to switch the alarm system on and off via the telephone. This means that if an assembly group returns late in the evening, for example, I can 'release' the door from my mobile telephone without the alarm going off. For this alone it has already been worthwhile."
Independent Master Carpenter