Comtech EF Data LCS-4 - Manual (Page 67)

LCS-4 L-Band Combiner Switch Revision 1
Remote Control Operation MN/LCS4.IOM
A.2.1 P
ACKET
S
TRUCTURE
C
ONTROLLER
-
TO
-T
ARGET
:
Start of Packet
Target
Address
Address
De-limiter
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 code
61 or 63
(1 character) (n characters)
Carriage
Return
ASCII code 13
(1 character)
Example: <0135/BSA=1{CR}
T
ARGET
-
TO
-C
ONTROLLER
:
Start of Packet
Target
Address
Address
De-limiter
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 code
61,63, 33 or 42
(1 character)
(From 0 to n
characters)
Carriage
Return
ASCII code 13, 10
(2 character)
Example: >0654/BSA=1{CR}{LF}
Each of the components of the packet is now explained.
A.2.1.1 S
TART
O
F
P
ACKET
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.
A-3