Question

please provide a description of how this is worked out

b) For each of the two following Postnet codes listed below, determine the zip + 4, the last two numbers of the address number (if applicable), and the check digit. WUULULL LLLLLLLLLLLLLL

Answer 1

Solution:

In Postnet, Each individual digit is represented by a set of five bars, two of which are full bars . The full bars represent "on" and small bar means "off". The first and last bar stands for Start and stop of the code. So while determining the decimal value, these 2 can be ignored. Now remaining codes need to be divided into group of 5 bars.

The following table shows the encoding for decimal digits. We need t use this table to understand the postcode:

Digit	binary	Barcode
0	1 1 0 0 0
1	0 0 0 1 1
2	0 0 1 0 1
3	0 0 1 1 0
4	0 1 0 0 1
5	0 1 0 1 0
6	0 1 1 0 0
7	1 0 0 0 1
8	1 0 0 1 0
9	1 0 1 0 0
Start/Stop	− − − − 1

Now take the first Postnet from the question , it has 52 bars. Remove first and last and divide remaining in 10 group each of 5 bars as follows:

5 رارار 1 ۔ (۱) 5 حه رارار 01 حمن ما لى - مه لى ل 3 و 4 , و د = = = = = = = د ارر1 - ارار |

Encoded data is : 5159348375

A 9 digit (plus check digit) barcode, contains the ZIP Code and ZIP+4 Code ( first 9 numbers)

So, the zip + 4 for this postnet is : 51593-4837

and last code is the check digit : 5

Now take the second Postnet from the question , it has 62 bars. Remove first and last and divide remaining in 12 group each of 5 bars as follows:

نه د دارا۱ - ۱۱۱۱۱ د آرا م ل د | | ج ||۱۱۱ ه م ۱lil , م د ار(۱( د ابرار م له إن ]۱۱) د را از - 6 ۱۱/۱

Encoded data is : 145278924756

An 11 digit (plus check digit) barcode, contains the ZIP Code, ZIP+4 Code ( first 9 code), and the delivery point code ( 10th and 11th together)

So, the zip + 4 for this postnet is : 14527-8924

Address number : 75

and last code is the check digit : 6