AT&T Merlin II Feature Module 2 System Manual page 190

Power Failure Telephones
DESCRIPTION
CONSIDERATIONS
HOW TO USE
2-184 MERLIN II System Features
In case of a power failure, a basic Touch-Tone or rotary telephone connected
to a Power Failure Telephone jack in a control unit module has access to
another line on the same module. (See Figure 2-26 to identify the PFT jack on
different line modules.)
When there is a power failure, all of the system except for power failure
telephones, shuts off. If you have plugged a Power Failure Telephone
into the PFT jack, the basic telephone automatically goes on when a power
outage occurs. You can use the power failure telephone to place and receive
outside calls.
FIGURE 2-26 A Power Failure Telephone Jack on a 408, 800, and 400 module.
_ Power failure
telephone jack
Bridges
to lowest
position
4 0 8
You cannot use a MERLIN II system voice terminal as a power failure
telephone.
Plug the basic telephone into the power failure telephone jack on a control
unit module. When there is a power failure, the power failure telephone
connects to the first line on the module.
Bridges
to lowest
Bridges
to lowest
P o w e r
position
failure
telephone
j a c k
4 0 0
w/TTR
P o w e r
failure
telephone
j a c k s
800