FXS port is up, on hook, FAX number returning slow busy
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?
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