Frame relay services - part 2 : integrated services digital network - frame relay bearer service - service definition 帧中继业务.第2部分:综合业务数字网.帧中继数据承载业务.业务定义
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Frame relay services - part 4 : broadband integrated services digital network b - isdn - frame relay bearer service - service definition 帧中继业务.第4部分:宽带综合业务数字网.帧中继数据承载业务.服务定义