Black Box ME445C-X.21, ME444AE-R3, ME445C-35, ME444A-R3, ME445C-530 manual Tail-circuit application

256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)

4-wire

twisted pair

DDS

(56 kbps)External clock

Receive

clock

	CSU/DSU	CSU/DSU 256-kbps	256-kbps
Sync host		Line Driver	Line Driver	Sync host
			Tail circuit

Figure 2-3. Tail-circuit application.

V.35 interface		V.35 interface
	4-wire
V.35	twisted pair
	(64 kbps)	V.35
cable		cable
		256-kbps
		Line Driver
IBM® S/3X		V.35 interface
mainframe

V.35

cable

256-kbps

Line Driver

V.35 interface

V.35

cable

256-kbps

Line Driver

Figure 2-4. Multipoint application.

IBM 3274 controller

IBM 3274 controller

IBM 3274 controller

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