Altigen ACM 6.7, Administrator'S Manual

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Triton Analog Trunk GS/LS Properties
MAXCS ACM 6.7 Administration Manual 131
Performing Impedance Match on Your Own
For each individual analog trunk that is connected to the CO when the system starts up,
MAXCS automatically selects an impedance profile to best match the Triton trunk
interface with the CO. In the unlikely event that this automatic selection does not yield
the optimal voice quality, you may want to disable the feature and select the best
impedance by trial and error method.
To disable automatic impedance matching, check the
Disable Impedance Match
During System Startup check box.
Trunk to Trunk Gain This configuration is to set Gain for calls that involve two
analog trunks (one in and one out). Because an analog
trunk typically has energy loss of 3-12 dB, a two-trunk
operation, like VM out call and MobileExt, may have low
volume issues because energy loss is doubled. This
configuration can compensate for the energy loss. The
valid range is 0 to 6 dB. Recommended value is 3 dB.
Caution : Setting the Gain too high may cause distortion
in voice quality and DTMF tone. Your CO may not be able
to recognize the dialing number if DTMF tones are
distorted.
Last Diagnosis Time The last time the Diagnosis button was clicked.
Diagnose button Use this button to view the Noise Level, Echo Return Loss,
and Hybrid Echo Return Loss, measured using the current
Impedance setting.
Noise Level The noise level (displayed after you click the Diagnose
button or the Match Impedance button). Acceptable
range for Noise Level is less than -67 dBm in value. For
example, Noise Level of -72 dBm is good and -63 dBm is
poor. You may experience high background noise and low
voice volume if Noise Level is poor.
Echo Return Loss The measurement for echo return loss (displayed after you
click the
Diagnose button or the Match Impedance
button). Acceptable range for Echo Return Loss is less than
-12 dB. For example, Echo Return Loss of -19 dB is good
and -8dB is poor. The IP phone users may hear their voice
coming back (echo) if Echo Return Loss is poor.
Hybrid Echo Return
Loss The measurement for hybrid echo return loss (displayed
after you click the
Diagnose button or the Match
Impedance button). Acceptable range for Hybrid Echo
Return Loss is less than -6 dB.
Rx Level at 600 Ohms The Rx Level measurement at 600 Ohms, obtained by
clicking the
Test Rx Level button. See Test Rx Level
button, below.
Test Rx Level button Tests the receiving level of the trunk channel on a call to
your local CO’s Milli-Watt Test Number after you set the
Impedance parameter to 600 Ohms and the Rx Gain to
0dB. Results are displayed in the Rx Level at 600 Ohms
field.
Parameter Description