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Issue 6
5 - 82
5.7
OPX(2)-U ( ) ETU
5.7.1
Description
The OPX(2)-U( ) ETU provides an interface for two
off-premise extensions. This ETU has a built-in ringing
generator (RSG). A maximum of 1600 of loop resistance
(including about 200 for the Single Line Telephone) is
acceptable between the OPX(2)-U( ) ETU and a Single
Line Telephone.
This ETU also provides circuitry for loop status detection,
talk battery, sending ringing signals from the RSG unit to
the Single Line Telephones, and dial pulse detection.
MBD-U10 Unit
The PBR circuit in the
ETU is required with Single Line Telephone Connection.
Figure 5-45 OPX(2)-U( )Unit
Installing Electronic Telephone Units
Electra Elite
( )
or the PBR( )-U
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