AT&T feature module 2 Basic Telephones with Opti and Btmi, a basic telephone connected to an Opti

Basic Telephones with OPTI and BTMI

DESCRIPTION	To provide service to people at a remote location, off-premises basic Touch-
	Tone telephones can be connected to the MERLIN II system through outside
	lines with the Off-Premises Telephone Interface (OPTI). The OPTI permits
	you to use an off-premises telephone to access many of the features of your
	on-premises communication system using dial codes and switchhook flashes.
	See Figure 2-15.
	On-premises basic Touch-Tone telephones can be connected to the system
	with a Basic Telephone and Modem Interface (BTMI). See Figures 2-16
	and 2-17. The BTMI also makes it possible to connect most other types of
	telephones and data devices to analog station jacks on the MERLIN II control
	unit.
	FIGURE 2-15 A basic telephone connected to an OPTI.
		Control unit	T o v o i c e
			terminal module
					I
				Off-premises Telephone Interface
				Off-premises line input
						Modular line cord
						O u t s i d e
						telephone
		To voice terminal	jack	Network			R e m o t e
				i n t e r f a c e
							b a s i c
		Modular terminal		j a c k
						Touch-Tone
			cord		I

Jack panel I

box

telephone

Accessory Equipment 2-171