Installation manual

OfficeServ 7400 System Description
© SAMSUNG Electronics Co., Ltd. 3-5
y The signaling specification and the signaling method of the T1 trunk line should comply
with the ITU G.703 and G.704 standards.
E1 Trunk Line
y The electrical characteristics of the E1 trunk line comply with the ITU G.703 and the
G.704 standards.
Table 3.6 Electrical Characteristics of the E1 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 (G.703) regardless of the codes.
Nominal and pulse 244 ns
Jitter of the I/O terminal Refer to the G.823
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 signaling specification and the signaling method of the E1 trunk line comply with
the ITU G.703 and G.704 standards E1.
Characteristics of the ISDN Interface Transmission
The electrical characteristics of the ISDN (BRI) interface comply with the ITU I.430 and
ETS 300 012 standards.
Table 3.7 Electrical Characteristics of the BRI Trunk Line
Categories Specifications
Transmission speed 192 kbits/s ±100 ppm
Code AMI
Pulse type Regular square wave: When indicating all valid signals,
comply with the mask (I.403) regardless of the codes.
Transmission media Pair of twisted lines
Load resistance 120 Ω
Indicated (pulse) nominal peak voltage 2.75 V