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3． Regenerator REG
Regenerator REG can compensate the optical attenuation caused by
transmission fiber and regenerate new optical signal for transmission.
5.2. Network topology
OPCOM3100-155 has flexible networking capacity and high transmission
reliability, and it provides both 1+1 path protection and 2F SNC-P protection.
1． Point-to-point network consists of 2 TM devices and transmits STM-1, E1
and Ethernet services.
E 1 e l e c t r i c a l s i g n a l /
E t h e r n e t s i g n a l
2． Chain topology
Chain topology is made up of two TM devices and several ADM devices.
Data is often transmitted in bi-direction and less optical fiber is needed.
TM
E1 electrical signal/
Ethernet signal
3． Ring topology
T M
o p t i c a l
Figure 5-3 point-to-point topology
STM-1 optical
signal
E1 electrical signal/
Ethernet signal
Figure 5-4 chain topology
S T M - 1
s i g n a l
E 1 e l e c t r i c a l s i g n a l /
E t h e r n e t s i g n a l
ADM
STM-1 optical
12
Raisecom Technology Co., Ltd
T M
TM
signal
E1 electrical signal/
Ethernet signal
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