I have a problem with a FXS port in a 3640 that is connected to an FXO port on a Panasonic PBX with Loop Start signaling. It is receiving duplicate DTMF events. I have tried various settings on the "timing digit" for that port at the following different settings: 50 ms, 100 ms, 250 ms, 500 ms.
However, I am still seeing the duplicate events.
The problem does NOT occur when a phone number is being dialed, but DOES occur mid-stream in a call.
Here is a sample duplicate of a user dialing 1-9,0 on the keypad. Voice Port Module signaling is enabled:
Feb 21 13:30:39.865 EST: htsp_digit_ready(3/0/0): digit = 1
Feb 21 13:30:39.945 EST: htsp_digit_ready(3/0/0): digit = 1
Feb 21 13:30:40.205 EST: htsp_digit_ready(3/0/0): digit = 2
Feb 21 13:30:40.285 EST: htsp_digit_ready(3/0/0): digit = 2
Feb 21 13:30:40.665 EST: htsp_digit_ready(3/0/0): digit = 3
Feb 21 13:30:41.161 EST: htsp_digit_ready(3/0/0): digit = 4
Feb 21 13:30:41.565 EST: htsp_digit_ready(3/0/0): digit = 5
Feb 21 13:30:41.925 EST: htsp_digit_ready(3/0/0): digit = 6
Feb 21 13:30:42.001 EST: htsp_digit_ready(3/0/0): digit = 6
Feb 21 13:30:42.425 EST: htsp_digit_ready(3/0/0): digit = 7
Feb 21 13:30:42.825 EST: htsp_digit_ready(3/0/0): digit = 8
Feb 21 13:30:43.241 EST: htsp_digit_ready(3/0/0): digit = 9
Feb 21 13:30:43.625 EST: htsp_digit_ready(3/0/0): digit = 0
The repeats happen randomly.
Here are the voice-port settings:
Foreign Exchange Station 3/0/0 Slot is 3, Sub-unit is 0, Port is 0
Type of VoicePort is FXS
Operation State is DORMANT
Administrative State is UP
The Last Interface Down Failure Cause is Administrative Shutdown
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 8 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 250 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 10 s
Interdigit Time Out is set to 10 s
Call Disconnect Time Out is set to 60 s
Supervisory Disconnect Time Out is set to 750 ms
Ringing Time Out is set to 180 s
Wait Release Time Out is set to 30 s
Companding Type is u-law
Region Tone is set for US
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 None
Translation profile (Incoming):
Translation profile (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 inactive
Digit Duration Timing is set to 250 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 [20 40] * 100 msec
Ringer Equivalence Number is set to 1
A diagram is:
WAN-----3640/FXS-----FXO/Panasonic----phones
Any recommendations?
