Specifications

CHAPTER 3. OfficeServ 7200 Specifications OfficeServ 7200 General Description Guide
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2.1.4 Signalling Type of the Station
Dial Pulse Signalling Type
y Ratio = 10 Pulses Per Second (PPS)
y Make/Break Ratio (M/B ratio) = 33 %: 66 % (can be adjusted in the software).
y The minimum signalling time between digits = 20 msec (can be adjusted in the
software).
DTMF Push Button Dialling
DTMF signal processing complies with the ITU standard and enables the user to
send/receive digital phone signals through the trunk line and to process analogue
phone signals.
2.1.5 Signalling Type of the VDSL
The electrical characteristics of the VDSL for using long-distance Ethernet are
shown in Table 3.14.
Table 3.14 Electrical Characteristics of the VDSL Interface
Category Specification
Transmission speed More then 20 Mbps
Modulation code Quadrature Amplitude Modulation (QAM)
Error detection Reed Solomon coding method
Transmission distance 1 km
Transmission media One pair of twisted lines
Characteristic resistance Splitter installed
Used frequency 138 kHz~12 MHz
Link speed Down link : 20 Mbps (300 m), Up link : 8 Mbps (300 m)