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
Single-Channel Foreign Exchange Voice Module
For RFL IMUX 2000 Intelligent T1 And E1 Multiplexers
RFL VF-10D (Office End)
DESCRIPTION
The RFL VF-10D is a Single Channel Two-Wire Foreign Exchange Office End (FXO) module
designed for use in IMUX 2000 terminal and drop/insert multiplexers. It accepts one voice channel as
input, and converts it 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-10D automatically detects if the system is T1 or E1 and configures
itself appropriately.
A circuit with an RFL VF-10D module at one end and an RFL VF-11 module at the other end can
provide a Foreign Exchange (FX) line or an Off-Premise Extension (OPX) line.
The VF-10D is remote-controllable when installed in an RFL remote controllable shelf. User-
adjustable switches allow local configuration of the following parameters:
o Selectable loop start or ground 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-10D RFL Electronics Inc.
June 23, 2001 1 (973) 334-3100
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