Packet Structure; Start Of Packet - Comtech EF Data SLM-5650B Installation And Operation Manual

C.5

Packet Structure

Start of Packet

Target Address
<
ASCII code 60
(1 character)
Example: <0135/TFQ=70.2345{CR}
Start of Packet Target Address
>
ASCII code 62
(1 character)
Example: >0654/RSW=32{CR}{LF}
C.5.1 Start of Packet
Controller-to-Target: This is the character '<' (ASCII code 60).
Target-to-Controller: This is the character '>' (ASCII code 62).
Because this is used to provide a reliable indication of the start of packet, these two characters may not appear anywhere else within the
body of the message.
Appendix C
Address Delimiter
/
ASCII code 47
(4 characters) (1 character)
Address Delimiter
/
ASCII code 47
(4 characters) (1 character)
Controller-to-Target
Instruction Code Code Qualifier
= or ?
ASCII codes 61 or 63
(1 character)
(3 characters)
Target-to-Controller
Instruction Code Code Qualifier
=, ?, !, or *
ASCII codes
61, 63, 33, or 42
(3 characters) (1 character)
C–3
SLM-5650B Satellite Modem
Revision 2
Optional Arguments End of Packet
Carriage Return
ASCII code 13
(n characters) (1 character)
Optional Arguments End of Packet
Carriage Return, Line
Feed
ASCII codes 13,10
(From 0 to n
characters) (2 characters)
MN-SLM-5650B