Tii 91 Series User Manual
Tii Equipment

P/N 92215701 • Rev C•
4/1/2008
Warranty: If this unit fails during the warranty period, contact tii customer service to authorize return. Unit may be returned prepaid.
Model tii 91 Series 
Expansion Modules 
Installation Note
Description
1. The tii 91 Series Expansion Modules consist
of a single station protector and a customer 
bridge module required to upgrade or expand 
subscriber lines within a tii Network Interface 
Device (NID). They are available with either 
traditional binding post terminations or gel-
sealed IDC terminations. 
Features
Figure 1
Figure 2
Installation
Installing the Protector
1. The Angle Driver (Sealed IDC Protector) is
delivered with a universal grounding and 
mounting tab (See Figure 1). If installing a 
new module into a NID, break away the 
unwanted ground tab from the module using a 
pair of pliers and discard (See Figure 3). 
Binding post protectors do not require this 
step. Simply Install the module on desired 
NID ground post and secure with washer and 
nut. 
Figure 3
Wiring
Angle Driver Sealed IDC Protector
1. The two upper ports of the Angle Driver are
intended to terminate subscriber (customer) 
wires. Telco drop (feeder) wires must be 
terminated in the two lower ports of the Angle 
Driver. 
2. Upper Port Subscriber Connections
(See Figure 4)
Subscriber terminations are already made in 
the factory. If it is necessary to re-terminate a 
subscriber wire, do so as follows: 
2a. Do not strip wire insulation. Make certain 
wire ends are cut flush with insulation. 
NOTE: RJ-11 PLUG IS 
NOT REQUIRED FOR 
NORMAL OPERATION. 
