burst control packet

Control Packet

convergence sub-layer packet data unit

Internet protocol control packet

layer packet-switch technology

Packet Control

Packet Control Unit PCU

Packet Layer

Packet Layer Procedure PLP

packet layer protocol

packet layer protocol(POS)SONET

ash layer control

BLC Boundary Layer Control

BLCS Boundary – Layer Control System

boundary layer control

boundary-layer control

control layer

control layer of the station

data flow control layer