EFJohnson 3000 SERIES Figure 3-3CONTROL BUSES

ARCHITECTURE

3.3.2 CONTROL BUS

The following are descriptions of control buses. Refer to Figure 3-3.

1.The IDB Idle/Collision line is a three level line that indicates if the line is idle, busy or collision occurred for the IDB communication process. This provides for high speed CSMA of the IDB.

2.The CSB Idle/Collision line is a three level line that indicates if the line is idle, busy or collision occurred for the CSB communication process. This provides high speed CSMA of the CSB.

INTRA-TERMINAL DATA BUS (IDB) IDLE / COLLISION

NetNIM
NETWORK						LOGGING	TELEPHONE
INTERFACE	CHANNEL	CONVENTIONAL			WIDE	ENCODER	INTERFACE
MODULE	INTERFACE	CHANNEL		AREA		MODULE	MODULE
	MODULE	MODULE	MODULE			LEMs	TIMs
	CIMs	CCMs	WAMs

		SYSTEM
DISPATCH	DISPATCH	NETWORK
INTERFACE	CHANNEL	MODULE
MODULE	MODULE	SNMs
DIMs	DCMs

CHANNEL STATUS BUS (CSB) IDLE / COLLISION

Figure 3-3 CONTROL BUSES

3-3