The Simplex Slave Talk Back Unit Metal Enclosure (AGNI-416) is a reliable half-duplex communication device engineered for fire alarm control rooms and emergency communication systems. Designed to support coordinated emergency response, this unit allows controlled two-way communication where only one person can speak at a time.
When the slave unit talk button is pressed, the master panel receives a signal from the field unit. The operator selects the corresponding zone line and presses the talk key, enabling the system to switch to “Talk & Listen Mode.” Because users cannot hear incoming communication while speaking, the system operates using the traditional “Over Code Word” protocol to signal conversation handover.
As per IS 2189 installation guidelines, the device should be mounted at a height of 1.4 m ± 0.2 m above finished floor level. It must be installed in clearly visible and accessible locations such as escape routes, near exits, and staircase lobby area to ensure immediate usability during emergencies.
Its rugged solid sheet metal enclosure and integrated circuit logic make it reliable for indoor fire alarm communication installations.
