公开(公告)号：WO1992009152A2

公开(公告)日：1992-05-29

申请号：PCT/US1991008271

申请日：1991-11-07

Applicant: INTEGRATED NETWORK CORPORATION

Inventor： INTEGRATED NETWORK CORPORATION ,  SHARPER, Craig, A. ,  REAMER, Lynne, A.

IPC: H04J03/12

CPC classification number: H04L12/42 ,  H04J3/125 ,  H04Q11/04

Abstract: In a telecommunication system, a circuit is provided for determining the system mode and for restoring converted signalling bits. The circuit is designed to be used in a telecommunication system that lacks frame alignment. The circuit may serve as a trunk line interface located in a Direct Digital Access Office Channel Unit. Alternatively, the circuit may be coupled to a single trunk line which links Customer Premises Equipment (CPE) to the telecommunication system. The detection portion of the circuit determines the system mode of the trunk line connected to a CPE by detecting singalling bits when frame alignment is not maintained. The restoration portion of the circuit restores signalling bits which were converted due to a lack of frame alignment to their pre-converted state.

Abstract translation: 在电信系统中，电路确定系统的模式并重构已转换的信令比特。 该电路被设计用于帧校准不完美的电信系统。 该电路可以作为位于直接数字接入办公室信道单元中的中继线的接口。 在另一个实施例中，电路可以连接到将客户办公设备（CPE）连接到电信系统的单独中继线。 当没有维持帧对齐时，电路的检测部分通过检测信令比特来确定连接到CPE的中继线系统的模式。 电路复原部分重建由于在其预翘曲状态下帧对准不足而已经转换的信令比特。