- Structure Size
- Commodity name: Bus fire telephone jack
The bus fire telephone jack is one of the components of the bus fire telephone system and must be used with the bus fire telephone switchboard. In case of emergency, the user can plug the portable fire telephone extension into the jack of the machine to call the switchboard. The local DIP switch preset 7-bit code, valid code range 1-99. Addresses 0 and greater than 99 are invalid. Coding can be set at the time of installation according to the needs of the project.
Standby current < 3mA Call current < 30mA Frequency range 300 ~ 3400Hz Address range 1 ~ 99 Ambient noise ≤ 60dB Humidity range ≤ 95% RH Operating temperature -10℃ ~ +50℃
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