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美国旧金山市府办公大楼己连到太平洋贝尔光纤网,该网是作为造价1500万美元的市县现代化长途通信网的一部分。至1987年底,市政通信系统将通过光纤、铜线缆、微波传输媒质,甚至红外传输媒质把80个左右的地段连接起来。旧金山市可能成为第一个使用自己的光纤设备服务的市政当局,它选用了16根光纤绞合的光缆,但最初仅使用4根扭绞光纤。旧金山市长途通信局局长Tom Buckle指出,价值为17.5万美元的连接线路的费用,虽然比铜线缆连接线路要贵10％左右,但由于它附加有其他功能以及提高了抗破
The San Francisco municipal government office building has been linked to Pacific Bell Optical Network as part of a $ 15 million city-county modern long-distance communications network. By the end of 1987, the municipal communications system would connect around 80 lots via fiber optics, copper cables, microwave transmission media and even infrared transmission media. San Francisco may be the first municipality to use its own fiber-optic equipment, choosing 16 fiber-optic stranded optical cables but initially using only 4 twisted-pair fibers. Tom Buckle, director of San Francisco’s Bureau of Long-distance Communications, said that while the cost of a $ 175,000 connecting line is about 10% more expensive than a copper cabling line, due to its additional features and increased resistance to breakage