本标准的目的是规定可在SONET接口上选择性使用的带内前向纠错码。具体而言，本标准定义了用于纠错码的SONET开销字节位置以及代码本身的规范。以前称为T1。105.08-2001（R2005）。

The purpose of this standard is to specify the in-band forward error correcting code that 5 be optionally used on a SONET interface. Specifically, this standard defines the SONET overhead byte locations that are used for the error correcting code and the specifications of the code itself. Formerly known as T1.105.08-2001(R2005).