June 2002, IEEE adopted a 10 Gb / s Ethernet standard rate - Cisco SFP and SDH SFP. Thus far, the development of Ethernet has gone through four stages, namely Ethernet, Fast Ethernet, Gigabit Ethernet and 10G Ethernet (10GE) phase. 10G Ethernet as a more traditional Ethernet technology upgrade, the original basis for Gigabit Ethernet transfer rate will be increased by 10 times the distance also increased significantly, from the traditional Ethernet can only be applied to limit the scope of the LAN, the Ethernet extends to the metro and wide area networks. The advantages of 10G Ethernet IEEE 802.3 Ethernet retains the Media Access Control (MAC) protocol, maintaining the same Ethernet frame format. 10G Ethernet has the following characteristics: only works in full duplex mode; increased WAN interface sublayer (WIS), can achieve a seamless connection with the Cisco SDH SFP Module.
10G Ethernet technology is applicable to all kinds of network structure, can reduce network complexity, to simple and economical to build a network of various rates, high-capacity transmission backbone network to meet the needs of metro transport to solve the "bottleneck" problem . The LAN, MAN, WAN uses the same core technology, to avoid the protocol conversion, to achieve a seamless connection, 10G Ethernet optical Ethernet end to end to achieve the basis for the future.Another family of Framer Mapper products provide flexible mapping of multi-channel T1/E1 or DS3/E3 clients into SDH SFP networks. The highest density product in this family provides mapping of 28 independent T1s (or 21 E1s) into an STS-1. It also supports the transparent transfer and regeneration of the independent T1/E1 clocks across the SONET/SDH network and meets all the jitter wanders specs of the T1/E1 client interfaces.
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