What is passive optical network
Passive Optical Network (PON) is a pure media network, which avoids electromagnetic interference and lightning effects from external equipment, reduces the failure rate of lines and external equipment, improves system reliability, and saves maintenance costs. , Is the long-awaited technology of telecom maintenance department. The business transparency of PON is good, and in principle, it can be applied to signals of any standard and rate. In particular, an ATM-based passive optical network (APON) can make use of the centralized and statistical multiplexing of ATM, combined with the sharing effect of passive splitters on optical fiber and optical line terminals, so that the cost is expected to be more than traditional circuit switching. The basic PDH/SDH access system is 20%-40% lower.
The business development of APON is implemented in stages, and the initial stage is mainly VP dedicated line business. Compared with ordinary dedicated line services, the VP dedicated line services provided by APON have low cost, small size, power saving, reliable and stable system, and certain advantages in performance-price ratio. The second step is to realize primary and secondary group circuit simulation services, and provide enterprise intranet connection and enterprise telephone and data services. The third step is to realize the Ethernet interface and provide Internet access services and VLAN services. Later, it will gradually expand to other services and become a veritable full-service access network system.
Passive optical network (PON) refers to the optical distribution network (ODN) between OLT (optical line terminal) and ONU (optical network unit) without any active electronic equipment.
