UC560 Lines remain taken after conference

[Ricardo Munioz Cabero]

Hi to all,

I have a small problem with this device:

• I start making a conference call, calling at two different parties (from the PSTN).
  • Call one destination.
  • Press the conference soft key.
  • Call the second destination.
  • Press the conference soft key again.
• The call works just fine.
• The problem is at the time of leaving the conference:
  • I either put the set on-hook or press the EndCall soft key.
  • I understand that this would just take me out of the conference, leaving the other parties active in the conference.
  • However, after I leave the conference, even when the other parties leave as well, the PSTN lines remain busy.
• I have tried using the "Supervisory Disconnect" configuration with "Dualtone Mid-call".
  • It seems to work sometimes but not always.
  • The FXO port configuration screenshots are attached.

Please if someone could help me with this.

[paolo bevilacqua · Accepted solution]

When you do that, you create an FXO to FXO connection. In that case, the DSP must remain in the loop to detect disconnect tones.  For that, have

voice-card 0

no local-bypass

Check if that improves the situation.

[Ricardo Munioz Cabero]

Thanks a lot, I will try that and post the results.

Going a little further:

• I see that there is only voice-card 0. And I have two VIC2-4FXO cards in the UC (one that came by default and one additional). Is this going to work for both of those cards?
• Could there be some negative results that I should be aware off?
• And what about the Supervisory Disconnect, is it ok with the Dualtone Mid-call, or should I try to return the default "Signal" option.

[paolo bevilacqua]

Voice-card is actually configuration for DSP, where the commands applies.

And, disconnect signal rarely works because telco do not support it. Only accurate tone configuration works.