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Fire Telephone Mobile Handset: Technical Specifications by Feras Diab is a document available to read on EtoBox.

The P-9911(M) is a mobile emergency telephone handset designed for indoor use, featuring a frequency range of 300-3400Hz and a ring sound level of 70 db(A). It is compatible with GST fire panels and operates within a temperature range of 0°C to +40°C. The handset is made of red ABS material and has a low voice distortion of less than 10%.

Author
Feras Diab
Language
EN