Samsung OfficeServ 7400 Installation Manual download pdf (Page 87)

OfficeServ 7400 System Description

3.2.1.4 Signaling Type of the Station

Dial Pulse Signaling Type

y Ratio-10 Pulse Per Second (PPS)

y Make/Break Ratio (M/B ratio)-33%: 66% (It can be adjusted by the software.)

y The minimum signaling time between digits-20 msec (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 regular phones.

3.2.1.5 Signaling Type of the VDSL

The electrical characteristics of the VDSL for using the long-distance Ethernet are shown

in the table below:

Table 3.18 Electrical Characteristics of the VDSL Interface

Categories Specifications

Transmission speed 1 M~16 Mbits/s

Modulation code QAM (Quadrature Amplitude Modulation)

Error detection Reed Solomon coding method

Transmission distance 1.0 km

Transmission media 1 pair of twisted lines

Characteristic resistance Splitter installed

Used frequency 138 KHz~12 MHz

Link speed Down link: 30 Mbps (300 m), Up link: 10 Mbps (300 m)

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Samsung OfficeServ 7400 Installation Manual Page 87