Hardware manual

Issue 8 Electra Elite
5 - 26 Installing Electronic Telephone Units
4.2.2 Installation
When a BRT(4)-U20 ETU is installed, a CLKG-U( ) Unit
must be installed on the CPUB( )-U( ) ETU.
A maximum of eight BRT(4)-U20 ETUs can be installed in
any interface slot in the system. The system limitation is
64 trunks.
The maximum number of BRT(4)-U20 ETUs depends on
other trunk cards installed. This ETU shares the total
number of CO/PBX lines in the system.
4.2.3 Switch Settings
SW1 is the reset switch.
DSW1 is used for maintenance. Normal operation is all 3
Off.
4.2.4 Jumpers
CN101 and CN102
Set the 100
termination to On or Off for Circuit 1.
Jumper Pins 1 and 2 are shorted together at the
factory to turn on the 100
terminal.
CN201 and CN202
Set the 100
termination to On or Off for Circuit 2.
Jumper Pins 1 and 2 are shorted together at the
factory to turn on the 100
terminal.
CN301 and CN302
Set the 100
termination to On or Off for Circuit 3.
Jumper Pins 1 and 2 are shorted together at the
factory to turn on the 100
terminal.