BEIJING HUAHUAN ELECTRONICS Co., LTD.
H9MO-1641S User Guide V2.2
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In case of failure of a node on the ring (such as loss of power supply), that node will be
automatically excluded from the network without affecting communication between other nodes of the
network.
To maintain stable operation of the network, the self-healing operation is shielded within a number
of minutes after turning on. Furthermore, it will not restore immediately when the conditions initialising
the self-healing has disappeared, and there is a protection period of 3~12 min., during which the
self-healing condition will remain. The protection period can be cancelled using the SNMP
management software.
2.2 Chain
Network
A chain transmission network as shown in Figure 2.2 can be formed using the H9MO-1641S
multiplexer.
B
A
A
A
Figure 2.2 Chain network
In figure 2.2, both the home and terminal equipment are terminal equipment, and the remaining
multiplexer is of relay type. “A” and “B” represents ‘Optical port A’ and ‘Optical port B’ of the device,
irrespective of the actual transmission direction. Two terminal devices can also form a point-to-point
connection. Please note the relationship between the home and terminal devices with the “A” and “B”
directions of the relay device. The master control console computer can be connected to any node
device on the chain network
2.3 Branch
Network
A branching network as shown in Figure 2.3 can be formed by using the H9MO-1641S multiplexer.
C
A
B
A
A
Figure 2.3 Branch network
By using the 3
rd
(optional) optical interface, the transmission path can be branched by using optical
port C of the interim H9MO-1641S to form a ‘T’ shape network in between any chain network. The
