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Intraplex Products
Section 1 – Introduction
This manual describes the setup and installation procedures for the Intraplex VF-40 Voice Frequency
Module. Experienced users may refer directly to the tables in Section 2 for configuration data. Your
Intraplex multiplexer operation manual gives additional information about this system.
The VF-40 four-port voice frequency module is designed to use in the Intraplex terminal and drop and
insert multiplexers and other Intraplex communications products. The voice interface is full duplex,
four-wire with PCM (Pulse Code Modulation) coding, allowing four voice channels to be carried in four
64 kbps time slots on T1 and other digital communications facilities.
Each VF-40 module provides high quality voice characteristics. The module has extended-range input
and output signal level adjustments to facilitate interfaces in most four-wire applications. The VF-40
voice module includes these features:
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Extended low frequency range (5-300 Hz range)
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One to four independent channels may be active simultaneously
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Two independent normally open/normally closed contacts per channel
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Remote control configuration and status reporting
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Selectable transmit/receive direction for use in drop and insert systems
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Input/output gain adjustment
