Overview
You wish to read certain FCDR fields such as origAddressGsm. You wish to know how to decode them to make them readable.
Solution
Internal Lithium Decoders
FCDRs are BER asn1 encoded and billing systems normally are able to decode the CDR.
The tp_fcdr tool available in Lithium is able to correctly decode the CDR including the OrigAddressGsm field even for Alphanumeric Originators.
Using External Tool Decoders
The CDR field origAddressGsm is GSM 7 bit encoded. The decoder must take this into consideration.
The field can be manually decoded by converting the HEX from raw CDR to 8 bit binary and then calculating 7 bit (septets) from this bit set. The 7 bits can then be compared to the GSM 7 bit character map to extract the characters.