The development trend for optical transmission equipment

Optical transmission equipment with broadband access and comprehensive service access has become the cosset in the most recent trend of development. On the one hand, products based on the PDH technique, which cost less than nine hundred USD, exhibit supreme inexpensiveness; on the other, the optical transmission equipment that develops on the basis of SDH technique, more often than not, is required by customers to be equipped with Ethernet interface or video frequency interface. As a typical PDH equipment, OM8E1PCM, produced by Heng Guang Technologies, Co., Ltd in Tianjin, China has integrated eight E1 channels, one 10/100BASE-T Ethernet channel, one NX64bps, V.35 channel and PCM30 with 30 channels. However, the exquisite equipment featured by its 2U height and 19- inch width costs only 1000 odd USD. (For more information about this equipment, please login

.) Sometimes, the designer may consider to realize the functions of VDF, DDF and ODF on the PCM, so as to provide the most customized and convenient product to clients. Such equipment is various and multiform in configuration and modality, which includes the European 7R series and 19-inch configuration. At the same time, SDH equipment with E1 channel, 1000M Ethernet interface and multi-channel 100M Ethernet interface has been more and more popularized. The broadband interface usually will adopt automatic and dynamic distribution manner, such as RPR technique.

low-priced optical equipment will be developed to include the comprehensive service access system. In addition to

10Base-T,100Base-T,1000Base-T with E1,E2,E3,T1,T2,T3 channels, 10/100 auto-adaptation Ethernet, G.703 V35 interface, V11/V24 interfaces, video frequency, even the SCADA system is about to be able to transmitted in one or two optical fibers.