Huahuan Electronics H20RN-2000.V2 Series, Hardware Description

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2 Architecture and Introduction
Hardware Description
H20RN - 2000.V2 Series Platforms
10
Beijing Huahuan Electronics Co., Ltd.
Version 1.3(Oct.2019)
DIP Definition Remark
K3_7/K3_8
ON/ON: selects 75
Ω
in the 12
th
E1 channel
OFF/OFF: selects 120
Ω
in the 12
th
E1
channel
K4_1
/
K4_2 ON/ON: selects 75
Ω
in the 13
th
E1 channel
OFF/OFF: selects 120
Ω
in the 13
th
E1
channel
8-position DIP
switches of K4
control 13~16
E1 impedance
selections
K4_3/K4_4
ON/ON: selects 75
Ω
in the 14
th
E1 channel
OFF/OFF: selects 120
Ω
in the 14
th
E1
channel
K4_5/K4_6
ON/ON: selects 75
Ω
in the 15
th
E1 channel
OFF/OFF: selects 120
Ω
in the 15
th
E1
channel
K4_7/K4_8
ON/ON: selects 75
Ω
in the 16
th
E1 channel
OFF/OFF: selects 120
Ω
in the 16
th
E1
channel
STM-1 Port
The optical port of SC01QE uses LC/PC dual - fiber SFP optical module. Single - fiber SFP optical
module is also required to use the optical Ethernet. When using single - fiber transceiver
module, there is only one optical fiber port. The optical port supports LAS (laser automatic
shutdown) function.
External Clock Input/output Port
MX01/PXM01 card of H20RN - 2000.V2 series platforms provides 1 - channel of external clock
input\output port, supporting 2MHz, 2Mbit/s clock mode. It is marked with “BITS”, using RJ45
socket. RJ - 45 connector diagram and pin definition are shown in Figure 2 - 5 and Table 2 - 7.