Signal Post Telephone

Signal Post Telephone

The SPT is housed in a thick powder-coated steel tube that mimics the tube of the signal post on which it is mounted at a height of about two meters. It is vandal resistant and can be exposed to a wide temperature range, heavy rain and busty wind. All openings are situated below the unit to prevent the ingress of rainwater. Insects are kept out by a stainless steel wire mesh.

The outdoor user, such as the train driver or maintenance, crew can stand next to it and converse with the station master by speaking in to funnel shaped opening below the unit. Speech from the station master emerges from a loud-speaker through the same opening.

A push button mounted below the set operates a micro-switch to call the SMC. This is the only control on the SPT and all its other functions are commanded remotely by the SMC.

Conversation through the SPT is entirely hands-free and it does not require any local power supply.