Where does field ACVSRCE in the ACVALD macro get its information from?

Document ID : KB000016441
Last Modified Date : 14/02/2018
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Introduction:

the ACVALD DSECT field ACVSRCE has a comment "Source of request always xlated to logical". The Sys guide this field is "The job's input source, physical (READER1, R3.RD1, and so forth) or translated if the physical/logical translation has occurred". 

Question:

Where does field ACVSRCE in the ACVALD macro get its information from?

Answer:

ACVSRCE gets its information from the callers POE field, or Port Of Entry. If the POE happens to be an IP address, ACF2 will convert it to a dot decimal format, also known as octets. 

An IP address consists of 4 numbers (0-255) in a dot decimal format, also known as octets. To translate this source, break it down to the four values, then convert from hex to decimal, giving the numeric IP address.

C5A81E62 = C5.A8.1E.62 = 197.168.30.98

where x'C5' = decimal 197
         x'A8' = decimal 168
         x'1E' = decimal 30
         x'62' = decimal 98