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OfficeServ 7200 System Description
© SAMSUNG Electronics Co., Ltd.
3-9
The electrical characteristics of the ISDN (PRI) interface comply with the ITU I.431 and
ETS 300 011 standards.
Table 3.12 Electrical Characteristics of the PRI Trunk Line
Category
Specification
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
Indicated (pulse) nominal peak voltage
3.00 V
Blank (non-pulse) peak voltage
0 ±0.300 V
The electrical characteristics of the Digital Line Interface (DLI) are shown in the table below:
Table 3.13 Electrical Characteristics of the DLI Line
Category
Specification
Transmission speed
384 Kbits/s
Code
AMI
Pulse type
Typical AMI waveform
3.2.1.2 Signaling Type of the Dedicated Line
Electrical Characteristics of the WIM Interface
The electrical characteristics of the V.35 interface are shown in the table below:
Table 3.14 Electrical Characteristics of the WIM Interface (V.35 Interface)
Category
Specification
Maximum transmission speed
10 Mbits/s
Transmission code
V.35 driver
Number of transmission lines
18
Characteristic resistance
100
Indicated (pulse) nominal peak voltage
±2 V
Input differential threshold
±80 mV
The electrical characteristics of the RS-232C (V.28) interface are shown in the table below: