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                    Fire Special Telephone(DH9271/9272)
                    Product Overview:

                    DH9271 without the address encoding, with DH9251 wire fire telephone host using the DH9272 address encoding; 

                    DH9261 bus system, with fire protection telephone hosts, the key parts of a building, to carry out a full duplex communication with fire protection telephone. You can call up the host, equipped with fire call sign.

                     




                     


                    Telephone extension: connect directly to the telephone line or connect to the telephone line via a telephone jack.

                    Telephone extension lead: U type clip, audio frequency 6.5 plug, two ways to choose.

                    Extension shell "work / call" indicator light: in standby mode, the indicator light is always on, indicating the extension is normal; the indicator blinks, indicating the called state, when the extension should ring.

                    There are 18 micro switches in the DH9272 extension, and 2~8 for the extension.

                    Note: no weight is allowed between the DH9272 extensions! The maximum address is 99.


                    Technical index (unit db)


                    project
                    0Km
                    5Km
                    Send loudness rating
                    ≥5
                    ≤15
                    Receive loudness rating
                    ≥-7
                    ≤2
                    Side tone masking rating
                    ≥6
                    ≥12


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