ATTACHMENTS TO THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). CATEGORY II ATTACHMENT REQUIREMENTS FOR 1 200 BITS PER SECOND HALF DUPLEX AND 1 200/75 BITS PER SECOND ASYMMETRICAL DUPLEX MODEMS STANDARDISED FOR USE ON THE PSTN.
公共交换电话网(PSTN)的附件 PSTN上使用的标准化每秒1200位半双工和每秒1200/75位非对称双工调制解调器的II类连接要求