Tii 8925 User Manual

▲WARNING: Do not install this unit or work

with telephone wiring during a lightning
storm. Telephone lines can carry high vol­tages from lightning, which can cause electric
shock resulting in severe injury or death.

CAUTION: Avoid the possibility of electric
shock from ringing voltage, when installing
this unit or working with telephone wiring.
Temporarily disconnect the subscriber wiring,
by inserting an RJ-11 plug in the jack at the
location you will be wiring. Never touch un­insulated wiring or terminals unless the line
has been disconnected.

141 Rodeo Drive Tii 8925 Series
Edgewood, NY 11717 Indoor Network Interface

Toll Free 888.844.4720 P/N 92211501
www.tiinettech.com 01/08 Rev B

FIGURE 1

(SCREW TERMINAL VERSION)

8925B SERIES

1. General

1.1 This installation note describes the in-

stallation of the tii 8925 Series (25-line) Indoor
Network Interface (INI) manufactured by tii.

2. Description

2.1 The 8925 Series INI is a demarcation

device that separates subscriber-owned from
telco-owned wiring. The demarcation is pro­vided by a RJ-11 test jack for each of the 25
lines inside the unit. The compact design of the
8925 Series INI allows for easy installation in
areas with limited space.

2.2 The unit is designed for use in place of
a 66 block. Using the same footprint as the 66
block, the 8925 Series INI is easily installed to
an 89B or 89D bracket (Figure 3).

INSTALLATION NOTE

2.3 Telco connection is accomplished by

means of a 25-pair connector (RJ-21) on the
rear of the unit (Figure 4).

FIGURE 2

(INSULATION DISPLACEMENT CLIP VERSION)

8925A SERIES

2.4 The subscriber interface panel includes

a hinged cover with wiring/testing instructions.

3. Precautions

FIGURE 7

4. Tools and Equipment

The normal complement of mechanical
tools is recommended for mounting and wiring
the unit.

5. Mounting

Using an 89B bracket, simply snap the
8925 Series INI on to the bracket (Figure 3).

FIGURE 3

6. Telco Wiring

6.1 The 8925 Series INI is provided with an

RJ-21 connector on the rear of the unit. Telco
connection is made by means of a 25-pair
wired standard male connector that is secured
to the back of the unit with the provided hook­and-loop strap (Figure 4).

FIGURE 4

7. Subscriber Wiring – Screw Terminal
Version – 8925B Series (Figure 1)

7.1 Open the orange cover and temporarily

disconnect the subscriber wiring by inserting an
RJ-11 plug in the jack at the location you will be
wiring.

7.2 Route subscriber wires through the wire
rungs attached to the subscriber bridge you will
be using. Strip off about ½ inch of insulation
from each wire (see Figure 7).

7.3 Loosen the terminal screws about one
turn and wrap the stripped wires under them –
between the washers. Match wires, color-to­color (example: red wire to terminal post

marked red, or a letter “R, green wire to a ter-

minal post marked green or “G” and so on).

Retighten the terminal screws (see Figure 7).

7.4 Remove the temporary inserted RJ-11
plug from the modular plug.

7.5 Use approved practices to test the line.

8. Subscriber Wiring – IDC Terminals
(Figure 2)

Open the orange cover and temporarily dis­connect the subscriber wiring by inserting RJ-