We have a remote CUCM 7 and an MGCP gateway with an FXS port configured for a FAX machine.
This worked fine up until yesterday.
These questions are mostly for my understanding of what is happening here:
The FAX number when called is returning slow busy.
I can see the call hitting the gateway when the number is dialed from an outside number.
There should be no config changes.
I have done a "sh/no sh" on the voice port.
The FXS port is shown below:
Foreign Exchange Station 0/1/0 Slot is 0, Sub-unit is 1, Port is 0
Type of VoicePort is FXS VIC-4DID
Operation State is DORMANT
Administrative State is UP
No Interface Down Failure
Description is Admin FAX
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 64 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 15 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 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 [20 40] * 100 msec
Ringer Equivalence Number is set to 1
I have a few questions:
Whenever a fast busy or slow busy is returned to the caller, is call manager providing both of these signal?
Slow busy would make sense, but I am not sure about fast busy.
So it is a slow busy, and I see no change in the port (dormant, on hook), could the FAX machine be a problem with these symptoms?
Is there a way for me to test the port remotely and get a ring or dial tone?