Central & Local announcement control system (CALAC)
CALAC is a Central Announcement and Local Announcement Control System designed for Railways. The CALAC System has two main units: one Located at the Headquarters and the other located at Station. The Headquarter System communicates with the Local Announcement system at various stations through a special control link placed between them. The Station system controls the Local announcement of the station also coordinating with the Headquarter system through the Control link..
CONTROL COMMUNICATION EQUIPMENTS FOR OFC USING 2-WIRE TELEPHONES (CCEO)
CCE are set of equipment used for traffic management and infrastructure control for the Railways. They enable quick and hassle-free communication between different sections to make traffic management more efficient and safe.
It is as per RDSO specifications – RDSO/SPN/TC/66/2007.
Level crossing gate control (LCGC)
Electronic LC Gate Telephone System is used for point to point & point to multipoint communication between a Station/Cabin and Level Crossing Gates where the number of points that can be connected is 7 (1 station telephone & 6 gate telephones).
It is as per RDSO specifications – RDSO/SPN/TC/51/2011