AX.25

OSI layer 2 (data link layer) protocol. Technically, it occupies layers 1-3.
Same layer as BATMAN-Advanced.
Used for packet radio by hams.
Can transport network layer protocols.
Not designed to support switching, though routers can probably be set up to handle it.
Support in the Linux kernel.
- v2.6.x: ax25.ko
Commonly used with three different communication specs:
- Bell 103 tones @ 300bps
- Bell 202 tones @ 1200bps
- G3RUH DFSK @ 9600bps
- These speeds are hard limits.
KISS encapsulates frames such that they can be send to a TNC for transmission. Derived from SLIP.
KISS is a serial protocol. Thus, multiple serial channels are required for multiple transceivers.
Other protocols fulfill the same function.