Comtech EF Data CDM-760 - Start of Packet; Target Address; Address Delimiter

Serial Interface Operation Revision 3
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
8–4
Target-to-Controller (Response to Command or Query)
Start of Packet Target Address Address Delimiter Instruction Code Code Qualifier Optional Arguments End of Packet
>
ASCII Code 62
(1 character)
0000 (default)
(4 characters)
/
ASCII Code 47
(1 character)
(3 characters)
=, ?, !, *, #, ~
(ASCII Codes 61, 63,
33, 42, 35, or 126)
(1 character)
(n characters)
Carriage Return
ASCII Code 13
(1 character)
Packet example – response received for issued query: >0000/TMC=10[cr][lf]
Detailed description of the packet components follow.
8.4.2.1 Start of Packet
The ‘<’ and ‘>’ characters indicate the start of an issued or received packet. They may not appear anywhere else within the body of the message.
• Controller-to-Target: This is the character ‘<’ (ASCII Code 60).
• Target-to-Controller: This is the character ‘>’ (ASCII Code 62).
8.4.2.2 Target Address
The Target Address designates the packet destination. The Controller does not have its own address. After the Controller sends a packet with the
designated Target Address, the Target responds to the Controller, using this same address, to indicate the source of the packet.
• In EIA-232 applications, this value is set to 0000.
• In EIA-485 applications, the permissible range of values is 0001 to 9999.
8.4.2.3 Address Delimiter
This is the “forward slash” character '/ ' (ASCII Code 47).