Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 155
o
packet-type
o
sub-header
o
data
The packet-type is a single byte:
Hex Value ASCII Description
0x30
0
Self-timed
0x31
1
Self-timed extended
0x32
2
Entering alarm
0x33
3
Entering alarm extended
0x34
4
Exiting alarm
0x35
5
Exiting alarm extended
0x36
6
Command response
0x37
7
Command response extended
0x38
8
Forced transmission
0x39
9
Forced transmission extended
...
Reserved for future use
0x7D
}
User defined
0x7E
~
Look to next byte for meaning
0xFF
Binary data, reserved for future use
The sub-header has the following comma delimited fields:
o
,id,start-byte,total-bytes,station-name:
packet-type
Numeric ASCII character defining packet type. See type
definitions in table, below
id
Numeric ASCII text defining the message id. Starts at 0. Rolls
over after 99.
total-bytes
Numeric ASCII text defining the total number of data bytes to
be sent (data only, does not include overhead bytes)
start-byte
Numeric ASCII text defining which byte of total-bytes is the
start byte of the current packet. Starts at 0.
station-name Optional ASCII field that has station name. Formatted as
,N=STATION NAME
16.2.2.
Iridium Header Examples
The following examples illustrate how to use the new header.
16.2.2.1.
Example 1
Message requiring one packet (i.e., non-extended), formatted pseudobinary B
interleaved, containing 6 values (42, 69, alternating).
Self-timed
0B1@AAhAktAAhAktAAhAkt
Entering Alarm
2B2@AAhAktAAhAktAAhAkt
Exiting Alarm
4B3@AAhAktAAhAktAAhAkt
