VG320 SCCP voice-port with noise

[dsobrinho]

Hi guys,

We have specific voice-port configured in security cabin/guardhouse connected to analog desk phone presenting noise during calls. Is there any way to improve and remove the noise. We have checked the cabling looks good, however I believe that the problem is due to the distance from the VG320.

VG320# show voice port 0/0/6

Foreign Exchange Station 0/0/6 Slot is 0, Sub-unit is 0, Port is 6
Type of VoicePort is FXS ON-BOARD-24FXS version 0xC3
Operation State is DORMANT
Administrative State is UP
No Interface Down Failure
Description is not set
Noise Regeneration is enabled
Non Linear Processing is enabled
Non Linear Mute is disabled
Non Linear Threshold is -21 dB
Music On Hold Threshold is Set to -38 dBm
In Gain is Set to 0 dB
Out Attenuation is Set to 3 dB
Echo Cancellation is enabled
Echo Cancellation NLP mute is disabled
Echo Cancellation NLP threshold is -21 dB
Echo Cancel Coverage is set to 128 ms
Echo Cancel worst case ERL is set to 6 dB
Playout-delay Mode is set to adaptive
Playout-delay Nominal is set to 60 ms
Playout-delay Maximum is set to 1000 ms
Playout-delay Minimum mode is set to default, value 40 ms
Playout-delay Fax is set to 300 ms
Connection Mode is normal
Connection Number is not set
Initial Time Out is set to 60 s
Interdigit Time Out is set to 60 s
Call Disconnect Time Out is set to 0 s
Supervisory Disconnect Time Out is set to 750 ms
Ringing Time Out is set to infinity
Wait Release Time Out is set to 30 s
Companding Type is u-law
Region Tone is set for BR

Analog Info Follows:
Currently processing none
Maintenance Mode Set to None (not in mtc mode)
Number of signaling protocol errors are 0
Impedance is set to 600r Ohm
Station name None, Station number 3001

Caller ID Info Follows:
Standard ETSI DTMF
Output attenuation is set to 14 dB
Caller ID is transmitted after 1 ring(s)
Translation profile (Incoming):
Translation profile (Outgoing):
lpcor (Incoming):
lpcor (Outgoing):

Voice card specific Info Follows:
Signal Type is loopStart
Ring Frequency is 25 Hz
Hook Status is On Hook
Ring Active Status is inactive
Ring Ground Status is inactive
Tip Ground Status is active
Digit Duration Timing is set to 100 ms
InterDigit Duration Timing is set to 100 ms
Hookflash-in Timing is set to max=1000 ms, min=150 ms
Hookflash-out Timing is set to 400 ms
No disconnect acknowledge
Ring Cadence is defined by CPTone Selection
Ring Cadence are [10 40] * 100 msec
Ringer Equivalence Number is set to 1

[Andrew Skelly]

You mention noise.  What type of noise is it that you are encountering?  Static, white noise, garbled audio, something else?  You also mention distance may be a factor.  What is the approximate distance from the VG to the guardhouse?  By the sounds of it the guardhouse is separate from the main building which leads me to believe there is cable outside, either aerial or via conduit.  Does the noise fluctuate with changes in weather?