公开(公告)号：US20030016694A1

公开(公告)日：2003-01-23

申请号：US09910707

申请日：2001-07-20

申请人： ADTRAN, INC.

发明人： Kevin W. Schneider ,  Thomas L. Ballard III ,  John B. Wilkes JR. ,  Philip David Williams ,  Gary M. Willoughby ,  Mark Jeffries Ogden ,  Michael Scott Sansom ,  W. Stuart Venters

IPC分类号： H04L012/66

CPC分类号： H04L12/2883 ,  H04L12/2856 ,  H04L12/289 ,  H04L12/66

摘要： Relatively low cost asymmetric digital subscriber line (ADSL) service and auxiliary POTS service are delivered over extended distances (e.g., at least 20-25 kft), by a hybrid ADSL-SDSL architecture insertable between central office and remote sites of an ADSL system. Central office and remote site transceivers employ trellis coded pulse amplitude modulation and a data rate that conforms with the signal transport capability of an extended distance symmetric DSL (SDSL) loop, while providing a 64K POTS channel. The central office and remote site transceivers controllably insert idle asynchronous transfer mode (ATM) cells in upstream and downstream ADSL channels to compensate for timing differences with ADSL equipment.

摘要翻译： 相对低成本的非对称数字用户线（ADSL）服务和辅助POTS服务通过可插入在ADSL系统的中心局和远程站点之间的混合ADSL-SDSL架构在长距离（例如至少20-25kft）上传送。 中央办公室和远程站点收发器采用格状编码脉冲幅度调制和符合扩展距离对称DSL（SDSL）环路的信号传输能力的数据速率，同时提供64K POTS信道。 中心局和远程站点收发器可控制地将上行和下行ADSL通道中的空闲异步传输模式（ATM）单元插入，以补偿与ADSL设备的时序差异。