Question: We want to use multi-destination mode of your VSP but we don't have a prefix character in our serial communications protocol. Our protocol is like this:
Anything we can do to make multi-destination work?
Answer: Sure! Look at it this way: your prefix character is ODH! This is because the address byte of the next packet is preceded by the ODH of the previous packet. To our VSP it doesn't matter that ODH logically belongs to the previous “chunk of data”. What is important is to have a “marker” that would tell the VSP when to expect the address byte. In this particular protocol, ODH is such a marker.
Of course, there will be a problem with the very first packet sent. The VSP will not route it correctly because there will be no ODH before this packet. In most systems the loss of one packet is not a big deal though.