Installation manual

CHAPTER 3. Specification of OfficeServ 7400

3-12

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 MΩ

3.2.3 Line Conditions

y Length for installation:

Regular phones: Up to 1 km (When the AWG #24 cable is used)

Digital phones: Up to 400 m (When the AWG #24 cable is used)

Door phones: Up to 400 m (When the AWG #24 cable is used)

AOMs: Up to 400 m (When the AWG #24 cable is used)

y Distance between PLIM and SMT-R2000: Up to 100 m (when an Ethernet cable is used)

y Leakage resistance between lines: More than 20 KΩ

y Leakage resistance between grounds: More than 20 KΩ