Specifications

P25 Development Guide
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3.4.6 MSR Response Frame Format
DATA in clear text
C0H
(SOF)
‘H’(0x48)
(TOF)
DATA ID
Number
DATA
Length DATA
CHECK
SUM
C1H
(EOF)
The ‘DATA’ field contains the three tracks of MSR data, the format of each track is:
Track No
(1 bytes)
Track Data Length
(4 bytes)
Track
Data
1. The Track No: 0x31 for track 1, 0x32 for track 2 and 0x33 for track 3;
2. The Track Data Length’s format is same as the DATA Length field;
3. If there are more than one track, track data should be filled in sequence.
 The format of other fields is same as the section 3.2.1
 Eg. C0 48 30 30 30 34 34 31 30 30 30 39 25 31 48 49 4A 4B 4C 4D 3F 32 30 30 30 39 3B
32 35 36 37 38 39 30 3F 33 30 30 31 31 3B 33 34 34 35 35 36 36 37 38 3F 7F 6E C1, This
frame has 3 tracks, Track1: <%1HIJKLM?>, Track2: <;2567890?>, Track3: <;344556678?>
DATA encrypted
C0H
(SOF)
(0x90)
(TOF)
DATA ID
Number
DATA
Length
DATA CHECK
SUM
C1H
(EOF)
Note: 0x90 means CT_ENCRYPT_DUKPT, which means DATA is encrypted by DUKPT. The
Field DATA Length is length of next field data. The length is the encrypted data’s length, not plain
text’s length.