Comtech EF Data SLM-5650B - Packet Structure; Start of Packet

SLM-5650B Satellite Modem
Revision 2
Appendix C C–3 MN-SLM-5650B
C.5 Packet Structure
Controller-to-Target
Start of Packet Target Address Address Delimiter Instruction Code Code Qualifier Optional Arguments End of Packet
<
ASCII code 60
(1 character) (4 characters)
/
ASCII code 47
(1 character) (3 characters)
= or ?
ASCII codes 61 or 63
(1 character)
(n characters)
Carriage Return
ASCII code 13
(1 character)
Example:
<0135/TFQ=70.2345{CR}
Target-to-Controller
Start of Packet Target Address Address Delimiter Instruction Code Code Qualifier Optional Arguments End of Packet
>
ASCII code 62
(1 character)
(4 characters)
/
ASCII code 47
(1 character)
(3 characters)
=, ?, !, or *
ASCII codes
61, 63, 33, or 42
(1 character)
(From 0 to n
characters)
Carriage Return, Line
Feed
ASCII codes 13,10
(2 characters)
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.