RAD Data comm Vmux-210 Specifications Page 159

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Installation and Operation Manual Chapter 6 Troubleshooting and Diagnostics
Vmux-210 Ver. 1.1 Testing Vmux-210 6-17
Table 6-8. General Troubleshooting (Cont.)
Trouble Symptoms Possible Cause Recommended Course of Action
Problems when testing
voice frequency tones
using an external testing
equipment
1. Verify that the tested tone is not one of
the set of tones that is detected, relayed
and regenerated by Vmux. These tones
are: 1100/2100Hz (Fax & Modem tones),
2000Hz (if Custom Tone Detection
parameter in the Vmux Voice Parameters
configuration is enabled), DTMF tones,
MFR2 tones (if MFR2 Relay is enabled on
Vmux-2100).
Change the testing tome.
2. If you are looping the transmitted test
tone back from the remote Vmux using a
loop, the Echo Canceller may be
detecting this return signal and canceling
it.
Disable the Echo Canceller during
this test, or connect additional
test equipment at the remote
end instead of looping back to
the tester at the local end.
Fax/Modem doesn't pass
through
1. Fax/Modem relay may be disabled Enable Fax/Modem relay. (Edit
Bundle>Voice
Parameters>Fax/Modem)
2. Problems on physical layer of E1/T1
between remote Vmux-2100/110 and its
local PBX
Verify that the clock source is
correctly configured on the
remote Vmux-2100/110, and
that it does not report any
physical layer E1/T1 alarms
6.5 Testing Vmux-210
The Vmux-210 diagnostic functions include:
Tone injection on analog ports
Remote loopbacks on analog ports or E1/T1 uplink
Ping utility.
Tone Injection
The test tone is a data sequence at a rate of 1 kHz. This data sequence is
identical to the data sequence that would have been generated if a 1 kHz signal
having a nominal level 0 dBm were applied to the input of the channel speech
processor. The tone should be received clearly by the corresponding subscriber
connected to the PBX at the nominal receive level.
The tone injection is activated individually per timeslot. However, multiple tone
injections can be run at the same time. Vmux-210 allows you to set the tone
injection timeout causing the tone relay to deactivate automatically after the
desired period of time.
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