CHAPTER 1.
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E1 C.O. Signaling
The electric characteristics of E1 C.O. line observes ITU G.703 and G.704 standards.
Table 1.8 Electric Characteristics of E1 C.O. line
Category
Description
Transfer Rate
2048 kbit/s ± 50 ppm
Code
HDB3(High Density Bipolar of Order 3)
Pulse Type
In general, square wave: All effective signals are displayed
under mask(G. 703) regardless of their codes.
Signal Standard, Signaling Method
ITU G.703 and G.704 standards are satisfied
Nominal Value and Pulse
244 ns
Jitter of I/O Port
ITU G.823 is satisfied
Transfer Media
Twisted-pair line
Load Resistance
120
Ω
Display(Pulse) Nominal Peak Voltage 3.00 V
Blank(No-Pulse) Peak Voltage
0 ±0.300 V
ISDN Interface Transfer Signaling
The electric characteristics of ISDN(BRI) interface observes ITU I.430 and ETS 300 012
standards.
Table 1.9 Electric Characteristics of BRI C.O. line
Category
Description
Transfer Rate
192 kbit/s ±100 ppm
Code AMI
Pulse Type
Mask characteristics satisfy ITU I.403.
Transfer Media
Twisted-pair line
Load Resistance
120
Ω
Display(Pulse) nominal Peak Voltage
2.75 V
The electric characteristics of the ISDN(PRI) interface observes ITU I.431 and ETS 300
011 standards.
Table 1.10 Electric Characteristics of PRI C.O. line
Category
Description
Transfer Rate
2048 kbits/s ± 50 ppm
Code
HDB3(High Density Bipolar of Order 3)
Pulse Type
The mask characteristics satisfies ITU I.403 standard.
Nominal and Pulse
244 ns
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