Transmission Characteristics; Line Conditions - Samsung OfficeServ 7200 System Description

3.2.1.4 Signaling Type of the Station
Dial Pulse Signaling Type

Ratio-10 Pulse Per Second (PPS)

Make/Break Ratio (M/B ratio)-33%: 66% (It can be adjusted by the software.)

The minimum signaling time between digits-20 ms (It can be adjusted by the software.)
DTMF Push Button Dialing
The DTMF signal processing complies with the ITU standard, which enables the user to
send/receive the signals of digital phones through the trunk line and to process the signals
of analog phones.

3.2.2 Transmission Characteristics


Attenuation
 Attenuation between subscribers: Less than 6 dB
 Attenuation between the subscriber and local trunk line: Less than 0.5 dB
Characteristic resistance of the line: 600 


Weighted noise: Less than-65 dBm

Crosstalk attenuation: Less than-68 dBm

Frequency band: 300~3400 Hz

Insulation resistance: More than 1 M

3.2.3 Line Conditions


Length for installation:
 Analog 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)

Leakage resistance between lines: More than 20 k

Leakage resistance between grounds: More than 20 k
© SAMSUNG Electronics Co., Ltd.
OfficeServ 7200 System Description
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