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-5A Dual-Channel Four-Wire E&M Voice Module
DESCRIPTION
The RFL VF-5A is a dual-channel four-wire E&M voice-frequency module, designed for use in IMUX
2000 T1 multiplexers. It accepts two voice channels as input and digitizes them; each channel occupies
one 64-Kbps time slot on T1 and other digital communications facilities. The RFL VF-5A can be used
in both terminal and drop/insert IMUX 2000 multiplexers.
The RFL VF-5A provides high-quality voice characteristics, compatible with AT&T Publication
43801. It allows 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.
User-adjustable switches and jumpers allow configuration of several parameters:
o Selectable Type I, II, or III signaling.
o Signaling on or off selection.
o Busy out settings.
o Selectable transmit/receive direction.
o Input/output attenuation.
o Time slot selection.
o Remote control configuration and status reporting.
RFL VF-5A RFL Electronics Inc.
June 28, 2005 1 (973) 334-3100
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