AT&T MERLIN 820 Installation Manual page 7

You must also have a network interface that links your system to the local
telephone company's lines. A telephone company representative should
have installed the necessary outside telephone lines and labeled the net-
work interface to indicate the telephone number for each outside line.
Depending on the type of interface provided by the telephone company,
your system may require additional wiring running from the network in-
terface to the jack field.
If you had your building wiring and jack field professionally installed, you
probably had the wiring from the network interface to the jack field installed
at the same time (if it was necessary). But if you prefer to install the wiring
from the network interface to the jack field yourself, this guide tells you
how to do so in "Preparing the Network Interface:" page 7.
The drawing, top right, shows direct connections between a voice terminal
and the control unit, and between the network interface and the control
unit. The drawing, bottom right, shows a voice terminal connected to the
control unit through the building wiring and a jack field. It also shows ad-
ditional wiring extending the outside lines from the network interface to
the jack field.
To comply with FCC regulations, notify your local telephone company of
the following before permanently connecting your system to their lines:
— System registration number: AS 593M-13529-KF-E
— Ringer equivalence number: 0.8A
— Telephone numbers of the lines to which you are connecting your
system
6
Network
interface
25-Pair
cable
Modular voice
terminal cord
Network
interface
Control unit
Modular voice
terminal cord
Control unit
Jack field
Modular wall jack
Building Wiring