Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL VF-10D RFL Electronics Inc.
June 23, 2001 23 (973) 334-3100
9. Dial an extension and verify that the extension rings.
If your phone system requires Fast Signaling set switch SW2-1 to the UP position
for No Signaling Delay on the VF-10D module.
10. Answer the extension and verify that the voice level is adequate in both directions, and that the
noise level is acceptably low.
11. Place both phones back on hook. Using the extension, dial the number of the line connected to
the RFL VF-11 under test.
The phone connected to the RFL VF-11 should ring 2 seconds on, and 4 seconds
off. While it is ringing, the amber LED on the front of the VF-10D (DS1 for
channel 1 should light.
12. Answer the ringing phone and verify that ringing stops and voice quality is acceptable.
The green LEDs at the VF-11 (DS5 for channel 1) and VF-10D (DS2 for channel 1)
should both be ON. The amber LED on the VF-10D will be OFF.
13. If there is a problem with the audio signal at either end, the system may not be properly
configured for the signal levels being applied. Low levels may be due to too much attenuation
at either end. Clipping (distortion of the waveform) may be due to excessive gain at either end.
Refer to step 18 on page 14 for additional information.
14. Change the settings on both modules, if necessary, to suit the desired circuit configuration. The
circuit may now be placed in service.
TROUBLESHOOTING
If there is an apparent malfunction, first check that the configuration is appropriate for the transmission
system in use, and that the transmit and receive configurations are identical.
Problems may occur at the common equipment or facility level that may affect the operation of this
module. Refer to the “Maintenance “ section in your multiplexer manual for system analysis
procedures.
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