Installation manual

CHAPTER 3. Specification of OfficeServ 7400
3-6 © SAMSUNG Electronics Co., Ltd.
y The electrical characteristics of the ISDN (PRI) interface comply with the ITU I.431 and
ETS 300 011 standards
Table 3.8 Electrical Characteristics of the PRI Trunk Line
Categories Specifications
Transmission speed 2048 kbits/s ±50 ppm
Code High Density Bipolar of Order 3 (HDB3)
Pulse type Regular square wave: When indicating all valid signals,
comply with the mask (I.403) regardless of the codes.
Nominal and pulse 244 ns
Transmission media A pair of twisted lines
Load resistance 120 Ω
Indicated (pulse) nominal peak voltage 3.00 V
Blank (non-pulse) peak voltage 0 ±0.300 V
y The electrical characteristics of the Digital Line Interface (DLI) are shown in the table
below:
Table 3.9 Electrical Characteristics of the DLI Line
Categories Specifications
Transmission speed 38144 kbits/s
Code AMI (Alternate Mark Inversion)
Pulse type Typical AMI Waveform