CHAPTER 3. OfficeServ 7400 Specifications
3-12
© Samsung Business Communications
3.2.2 Transmission Characteristics
y
Attenuation
Attenuation between subscribers: Less than 6 dB
Attenuation between the subscriber and local trunk line: Less than 0.5 dB
y
Characteristic resistance of the line: 600
Ω
y
Weighted noise: Less than -65 dBm
y
Crosstalk attenuation: Less than -68 dBm
y
Frequency band: 300~3400 Hz
y
Insulation resistance: More than 1 M
Ω
3.2.3 Line Conditions
y
Length for installation:
Analogue phones: Up to 1 km (when AWG #24 cable is used)
Digital phones: Up to 400 m (when AWG #24 cable is used)
Door phones: Up to 400 m (when AWG #24 cable is used)
AOMs: Up to 400 m (when AWG #24 cable is used)
Length between 4WLI and Combo Access Point: Up to 600 m (when AWG #24 cable
is used)
y
Leakage resistance between lines: More than 20 k
Ω
y
Leakage resistance between grounds: More than 20 k
Ω