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
Dual-Channel Foreign Exchange Voice Module
For RFL IMUX 2000 Intelligent T1 and E1 Multiplexers
RFL VF-15C (Office End)
DESCRIPTION
The RFL VF-15C is a Two-Wire Foreign Exchange Office End (FXO) module designed for use in
IMUX 2000 terminal and drop/insert multiplexers. It accepts one or two independent voice channels as
input, and converts each channel into a 64 kbps digital signal which can be transmitted over T1, E1 or
other digital communications facilities. It does this using μ-law PCM coding for T1 systems and A-law
PCM coding for E1 systems. The VF-15C automatically detects if the system is T1 or E1 and
configures itself appropriately.
A circuit with an RFL VF-15C module at one end and an RFL VF-16A module at the other end can
provide a Foreign Exchange (FX) line or an Off-Premise Extension (OPX) line.
The VF-15C is remote-controllable when installed in an RFL remote controllable shelf. User-
adjustable switches allow local configuration of the following parameters:
o One or two channel operation.
o Loop start.
o Service enable/disable.
o Remote control configuration and status reporting.
o Selectable transmit/receive direction.
o Extended range input/output level compensation.
o Selectable time slot assignment.
o Signaling delay on/off.
o Normal or enhanced mode.
RFL VF-15C RFL Electronics Inc.
August 7, 2012 1 (973)
334-3100
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