The channel is denoted by a 32-bit integer; however "recommended channels" is 32. This effectively leaves 27 unused bits in the channel descriptor.
Support for conversations CAN'T change the protocol (well, it shouldn't, because there is no protocol version indicator), but the implementation can use the higher bits of the channel as the conversation indicator.
On older implementations, any use of conversations would simply result in the message being dropped.
The
channelis denoted by a 32-bit integer; however "recommended channels" is 32. This effectively leaves 27 unused bits in the channel descriptor.Support for conversations CAN'T change the protocol (well, it shouldn't, because there is no protocol version indicator), but the implementation can use the higher bits of the channel as the conversation indicator.
On older implementations, any use of conversations would simply result in the message being dropped.