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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
To voice
terminal module
To voice terminal jack
Modular terminal
cord
Jack panel
I
box
I
Off-premises Telephone Interface
Off-premises line input
Modular line cord
Outside
telephone
Network
interface
Remote
jack
basic
I
Touch-Tone
telephone
Accessory Equipment
2-171