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VG310 Pulse Dialing


Hi all,


I have an issue with an VG310 gateway. We connected an old "dialing device" (I have no idea how it is called in English), basically it calls an array of phone numbers if it detects some kind of disruption on external sensors.


But I just don't get it to work. When I connect a plain analog phone to the FXS port it works fine.


In the debugs (enclosed) I see  that the "dialing device" goes Off-Hook and a few seconds later it goes back to On-Hook without sending any digits. 

I suspect that the device could be using pulse dialing. I already used pulse-digit-detection in the config of the FXS port.

Is there something else I have to configure to support devices that use pulse dialing? Or did I miss something else?


The VG310 is using MGCP to a Call Manager 11.5.




Voice-Port Config

voice-port 0/0/11
 compand-type a-law
cptone DE
timeouts initial 4
timeouts interdigit 4
timeouts call-disconnect 4
timeouts ringing infinity
timeouts wait-release 4
timeouts power-denial 2500
timing hookflash-in 100 10
impedance complex1



Voice-Port Info

Foreign Exchange Station 0/0/11 Slot is 0, Sub-unit is 0, Port is 11
 Type of VoicePort is FXS  ON-BOARD-24FXS version 0xC3
 Operation State is DORMANT
 Administrative State is UP
 The Last Interface Down Failure Cause is Administrative Shutdown
 Description is 
 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 4 s
 Interdigit Time Out is set to 4 s
 Call Disconnect Time Out is set to 4 s
 Supervisory Disconnect Time Out is set to 2500 ms
 Ringing Time Out is set to infinity
 Wait Release Time Out is set to 4 s
 Companding Type is A-law
 Region Tone is set for DE

 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 complex1 Ohm
 Station name None, Station number None
 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=100 ms, min=10 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


2 Replies 2

Andrew Skelly
Rising star
Rising star

This might be a silly question, but how old is "old"?  The reason I am asking is it possible that the device uses ground start instead of loop start?  You mention this in the config:


 Voice card specific Info Follows:
 Signal Type is loopStart

Have you tried changing it to ground start to see if the dialing device will get tone? 

Please rate helpful posts by clicking the thumbs up!


I think it is about 20 years old. I actually did try ground start but without any luck.

My perception from the debug output was the device gets an dial tone but the gateway does not revive digits.


Jul 22 10:27:51  39021: 019901: Jul 22 10:27:50.430: //372/6D50627484BE/CCAPI/ccGenerateToneInfo:
Jul 22 10:27:51  39022:    Stop Tone On Digit=FALSE, Tone=Dial Tone,


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