Number Design Optimization

For some numbers, such as serial numbers, service numbers (the laptop's warranty number), and other numbers to be used.
Generally, letters and numbers are randomly generated (or regularly generated ).

However, when passing these numbers, such as by phone or writing, there is always some inconvenience.

Number1234567890
LetterAbcdefghijklmnopqrstuvwxyz

The following groups of numbers are easy to confuse when the voice is passed.
G J
1 E
2 R
Z v

When numbers are manually transferred, the following groups of numbers are likely to be recognized incorrectly.
O 0 d Q
1 I
U V
8 B

The following letters are two-tone reading, which is not conducive to quick reading.
Fhlmqrswx

The remaining codes that are easy to use are as follows:

1234567890 acknpty (fhlmswx)

17-bit non-dual audio
24-bit dual-tone