AT&T 518-455-317 manual Control Unit

CONTROL UNIT

		Primary		Expansion
		Carrier	Main Circuit	Carrier	Main Circuit
						Break	er
			Breaker
206 Modules			400
			Modules
Primary			Expansion
Processor		Module	Processor
Grounding		Screw	Module
Outside	Line Jacks		Outside Line
			Jacks
Power	Indicators		PAGE Jack
(LEDs)
Extension		Jacks	SMDR Jack

(206 modules only)

MUSIC ON HOLD

Volume Adjustment Screw

	Expansion
MUSIC ON HOLD Jack		Cable	Power Indicators
(for RCA phono plug)
			(LEDs)

SYSTEM PHONES	Optional Devices	Optional Devices
	(for the control unit)	(for extension jacks)

			AT&T Serial Printer		Standard
				PARTNER MAIL
MLS-34D® Phone					Touch-Tone
				voice messaging
	MLS-18D® Phone				Phone
(with optional MLS-CA24
Intercom Autodialer)		PARTNER	AT&T Paging System	system
		MAIL VS
		voice messaging
		system
MLS-12D® Phone	MLS-12® Phone	AT&T Call Accounting			Answering
		Terminal (Basic or Plus)		Fax Machine	Machine
				Doorphone	Alert
MLS-6® Phone	MLC-6 Phone	AT&T Magic on Hold® deck

Figure 1-1. Sample System Components

Overview 1-3