Master control station MCS, Desktop Station, Extension, amplifier for MCS and Desktop stattion, Wall or Column, mounted weather proof field call station with handset and, built in power amplifier with 15 W RMS, built in power amplifier with 15 W RMS in pilfer proof, enclosure, Portable handset station with multi plug and 25, mtrs wire., Wall or Column mounted 4 W cone type, loudspeaker., Wall or Column mounted 15W horn type, Explosion Proof handset Station with, Explosion Proof speaker suitable for group- IIC, Power, Distribution Box, Line card, Processor card, IPU Card, Black Handset for wall mounted station, Clamp for, Speakers or handsets