Since the failure modes are complex, it is important to define cut-offs precisely so that valid comparisons can be made between cut-offratio measurements from a variety of sources.
由于失效模式复杂，主要必须对切断明确定义，使不同来源的切断比测量值之间，可以作有效的比较。
2
The cut-offratio may be defined in general, as the percentage of established facsimile calls that are terminated prior to the transmittal of all the pages in the facsimile transaction.