Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL Electronics Inc.
I N S T R U C T I O N D A T A
RFL VF-6I Single-Channel Four Wire Orderwire Voice Frequency Module
DESCRIPTION
The RFL VF-6I is a single-channel four wire voice-frequency module, designed for use in IMUX 2000
T1 and E1 multiplexers. It accepts one voice channel as input and uses u-law PCM encoding to convert
the analog voice signal into a companded 8-bit, 64-Kbps digital signal. The RFL VF-6I can be used in
both terminal and drop/insert multiplexers.
The RFL VF-6I provides high quality voice characteristics compatible with AT&T Publication 43801.
It allows VF-6 compatible signaling control or E & M signaling of Type I, II, and III, with front panel
busy indicators. It has calibrated extended-range input and output signal level adjustments to facilitate
interfaces in most four-wire applications.
The VF-6I module is fully compatible with the RFL VF-6 module and is functionally compatible with
the VF-5A module.
User-adjustable switches and jumpers allow the configuration of the following parameters:
o Selectable signaling control (VF-6 compatible) or E&M Type I, II, and III signaling.
o Signaling format - CAS in E1, RBS in T1, or no signaling.
o Busy out setting.
o Selectable Bus A, Bus B, or Both (D&I).
o Input/output attenuation.
o Time slot selection.
o Remote control configuration and status reporting.
o Selectable transmit control (continuous transmit, hook-switch, voice activate (VOX) or
receive only).
o Selectable Bridge mode or Multi-drop (orderwire) mode.
RFL VF-6I RFL Electronics Inc.
December 15, 2011 1 (973)
334-3100
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