Comtech EF Data MCED-100 - Manual (Page 61)

MCED-100 MetaCarrier Embedding Device Revision 1
Serial-based Remote Product Management MN-MCED100
5–5
5.2.2.1 Start of Packet
Controller‐to‐Target: This is the character ‘<’ (ASCII code 60).
Target‐to‐Controller: This is the character ‘>’ (ASCII code 62).
The ‘<’ and ‘>’ characters indicate the start of packet. They may not appear anywhere else within the body of the message.
5.2.2.2 Target Address
In EIA‐232 applications, this value is set to 0000.
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.
5.2.2.3 Address Delimiter
This is the “forward slash” character '/ ' (ASCII code 47).
5.2.2.4 Instruction Code
This is a three‐character alphabetic sequence that identifies the message subject.
Wherever possible, the instruction codes have been chosen to have some significance – e.g., IPA for Management IP Address, IPG for IP
Gateway Address, etc. This aids in the readability of the message, should it be displayed in its raw ASCII form.
Only upper case alphabetic characters may be used (‘A’ to ‘Z’, ASCII codes 65 ‐ 90).