Transmission Characteristics; Line Conditions - Samsung OfficeServ 7100 series System Description

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3.2.1.3 Station Signaling
Dial Pulse Signaling
 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.)

4TRM Module board is only support DTMF dialing, but not supports for Dial Pulse

dialing. 8TRK Cards is support DTMF and Dial Pulse dialing.
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 regular 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 Ω

Weighted noise: Less than -65 dBm

Crosstalk attenuation: Less than -68 dBm

 Frequency band: 300~3400 Hz
 Insulation resistance: More than 1 MΩ

3.2.3 Line Conditions

 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)

Length between PLIM and to SMT-R2000: Up to 100 m (When the Ethernet cable
is used)
 Leakage resistance between lines: More than 20 KΩ
Leakage resistance between grounds: More than 20 KΩ

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