If the receiver detects an error in the first character, it uses the copy.

Since traditional methods for detecting an error were often very difficult and time-consuming, such a behavior was considered desirable.

Statistically, this made the chance of detecting an error less than 16 bytes long 99.9969%, and even higher for longer data.

The southern end of the bridge was worked on ahead of the northern end, to detect any errors and to help with alignment.

When frame relay detects an error, it simply drops the offending packet.