United Data Corporation

A Proctor Company


Long Loop Adapters


Telephone Demonstrators

Privacy Modules

Telephone Power Supply




Voice & Data Privacy

41434 Line Guard
Model 41434 Line Guard

The Proctor Model 41434 Line Guard can be used in the home or office to give computer, facsimile and other types of data transmission devices uninterrupted use of the phone line once they access it. The module can also be used to protect telephones from eavesdropping and annoying interruptions.

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How It Works

41434 Schematic

The 41434 Line Guard installs in series with the Central Office (C.O.) line, splitting it into two separate extension lines marked "Port 1" and "Port 2". Whichever port is used to dial out or answer a call first is given exclusive use of the C.O. line; the other port is prevented from accessing the line until the first port's call is terminated and the C.O. line is clear. Line ports "1" and "2" work with either voice or data devices and each port can serve multiple station devices . A balanced cutoff is provided on each port to provide maximum line privacy.

Typical Data Application

41434 Application

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Key Benefits

    Works with all standard telephone systems.
    Works with data transmission devices
    and standard telephones.
    Each line port ("1" or "2") can serve
    multiple data or voice devices (the 41434
    does not provide exclusivity between stations
    sharing the same port).
    Easy to install; standard modular connectors
    are provided for the C.O. line and two
    extension ports.
    Operates on telephone line current;
    does not require any external
    power source.
    The modules do not affect transmission,
    signaling, or pulsing characteristics
    of the line.
    FCC Registered

Model 41434 Specifications

    • Modular RJ11 Jacks
    • C.O. Line Operating Voltage: 24VDC or 48VDC
    • C.O. Line Current: 25 to 120mA
    • Insertion Loss - Unoperated: <0.2dB @ 1kHz
    • Insertion Loss - Operated: 70dB minimum
    • Fuse: 3AG 500mA 250V Slow Blow
    • Operating Temperature:  0 to 50C
    • Storage Temperature:  -20 to 70C
    • Humidity: 0% to 95% (Non-Condensing)
    • Dimen: 4.0" (101mm) W x 2.0" (50mm) H
      x 1.0" (25mm)D
    • Wt: 1.0 oz (28 grams) 


Copyright United Data Corporation, Inc.


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