User's Manual
HT8000-I/HT8000-II/HT8000-VI
2 Hardware Architecture
Version 1.4(Oct.2019)
Beijing Huahuan Electronics Co., Ltd.
85
1.
PRI: The optical path with high-priority
RO interface (connecting to RX interface of UNI-side device) outputs optical
signal which received by NNI-side protection channel RI2 to the UNI-side PRI
channel RX interface.
TI interface (connecting to TX interface of UNI-side device) inputs UNI-side TX
signal and transmits it to TO2 interface of NNI-side protection channel.
2.
SEC: the optical path with low-priority
RO interface (connecting to RX interface of UNI-side low-priority device) service
is interrupted.
TI interface (connecting to TX interface of UNI-side low-priority device) service
is interrupted.
When the working channel is in non-return mode, after the working channel is
restored, the protection channel will not be switched to the working channel.
When the working channel is in return mode, the protection channel is switched to
the working channel according to the return time after the working channel is
restored.
Management Ports
P1R1-MP provides 1 NM port and 1 CONSOLE port as its network
management ports, marks and definitions are shown in Table 2-12.
Network management ports use standard RJ-45 socket whose connector
diagram is shown in Figure 2-9, NM port is the FE electrical port; see its
socket definition in Table 2-13. CONSOLE port pin definition is shown in
2.2.36 3-fan Card (FFT30)/6-fan Card (FFT6)
FFT30 is a 3-fan card for HT8000-I device; FFT6 is a 6-fan card for
HT8000-II/HT8000-VI device. FFT3/FFT6 provides heat dissipation
function for the equipment, making it operates normally and efficiently at
the designed temperature.
FFT3/FFT6 supports manual speed adjustment and automatic speed
adjustment. Manual speed adjustment can manually adjust the fan speed to
achieve the manual control of low speed, medium speed and high speed.
Automatic speed adjustment realizes fan intelligent speed control within
