What are the principal features of the A-PHY data link layer?

The A-PHY Data Link Layer is a protocol-agnostic layer that performs scheduling, prioritization and forwarding of A-Packets.

• Each protocol adaptation layer has at least one A-PHY protocol interface (APPI) connection to the A-PHY Data Link Layer.
• The A-PHY Data Link Layer may be connected to multiple protocol adaptation layers using a single local function.
• The A-PHY Data Link Layer may have a single A-PHY network function connected to it, or multiple A-PHY network functions.