User`s manual

Chapter 1 Overview
9
1.3 Technical Specification
1.3.1 Electrical Characteristics
The on board E1 interfaces for MUXpro Series refer to ITU-T G.703 (Physical /
electrical characteristics of hierarchical digital interfaces).
Table 1-2 Electrical Characteristic of E1
Bit rate
2.048 Mbps ± 50ppm
Line code HDB3
Pulse shape Meet G.703, see Appendix I
Peak voltage of mark
2.37V± 10%(75Ω) 3V± 10% (120Ω)
Peak voltage of space
0±0.237V(75Ω) 0±0.3V(120Ω)
Pulse width
244ns± 25ns
Ratio of amplitude 0.95 to 1.05
Ratio of width 0.95 to 1.05
Output jitter Refer to G.823, see Appendix I
Input attenuation
Attenuation ≥6db at 1024kHz
Jitter tolerance Refer to G.823, see Appendix I
Jitter transfer Refer to G.823, see Appendix I
Wander Refer to G.823, see Appendix i
Return loss
51 kHz~102 kHz ≥12dB / 102 kHz~2048 kHz ≥ 18db /
2048 kHz~3072 kHz ≥ 14dB
The on board Ethernet interface for MUXpro Series refers to IEEE-802.3 (Carrier
sense multiple access with collision detection access method and physical-layer
specification) with RJ-45 connector.