TELECOMMUNICATIONS - TELEPHONE TERMINAL EQUIPMENT - PERFORMANCE AND COMPATIBILITY REQUIREMENTS FOR TELEPHONE SETS WITH LOOP SIGNALLING **REVISION B WAS CORRECTED AS OF 6/5/98 - PREVIOUS BUYERS CALL GLOBAL CUSTOMER SERVICE FOR A REPLACEMENT COPY **
电信.电话终端设备.带环路信号的电话机的性能和兼容性要求**修订版B自1998年6月5日起进行了修正-之前的买家致电全球客户服务部要求更换副本**