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 |
