Comtech EF Data CRS-500 - Manual (Page 165)

CRS-500 1:N Redundancy System Revision 2
Serial-based Remote Product Management MN-CRS500
9–5
9.4.2 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: <0000/RSH=30[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: >0000/BBU=107[cr][lf]
9.4.2.1 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.