MICROTRONIX Access 1000 - Rfc1006; Q-Mbit; Oftp

Microtronix Access User Guide
Payload length Payload
MSB LSB Application message
12.4 RFC1006
This method guarantees message boundaries in exactly the same way as the MBIT method described
above. Only the message header differs in length and value. The RFC1006 header consists of 4 bytes
consisting of 2 fixed-value bytes (for identity and recognition) followed by the length of the entire
message, payload and header.
RFC1006 message format:
Version Pad
RFC1006 message length
(4 + payload length)
Payload
0x03 0x00 MSB LSB Application message
12.5 Q-MBIT
This method guarantees message boundaries in exactly the same way as the RFC1006 method
described above. The message header differs in the pad byte. The Q-MBIT header has 4 bytes
consisting of a fixed-value byte (for identity and recognition), a Q-bit flag byte coded 0 or 1, followed by
the length of the entire message, payload and header. Q-bit packets are used by some X.25
applications for passing control information..
Q-MBIT message format:
Version Q-bit
Q-MBIT message length
(4 + payload length)
Payload
0x03 0x00/1 MSB LSB Application message
12.6 OFTP
This method guarantees message boundaries in exactly the same way as the MBIT method described
above. Only the message header differs in length and value. The OFTP header consists of 4 bytes
consisting of 1 fixed-value byte (for identity and recognition) followed by a 3-byte length of the entire
message, payload and header.
OFTP message format:
Version
OFTP message length
(4 + payload length)
Payload
0x10 MSB LSB Application message
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