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New Member

SPA112 Keeping line open

I have a device connected to a SPA112 which initiates a call to our operator. When the operator ends the call the device goes silent for a few seconds then gives the off hook howler tone. As there is no handset to this device, the only way to stop this is to reboot the SPA112. I have tried changing the CPC settings but this has not worked. Is there any other way I can get the call to disconnect from both side.

Thanks

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1 ACCEPTED SOLUTION

Accepted Solutions
VIP Gold

SPA112 Keeping line open

Well, it's a challenge, somewhat. Althougt the "official answer" seems to be - it is not possible, I see a little chance.

You may know that DTMF signals are combination of two frequencies. * is 941Hz + 1209Hz; # is 941Hz + 1477Hz. And tones on SPA112 are configurable.

So try to configure the appropriate tone on SPA112 to sound exactly as DTMF's *# sequence.  Try this:

941@-5,1209@-5,1477@-5; 8(0.5/0.5/1+2,0.5/1/1+3)

If it will works, call me "Great Shaman" ;-)

... and mark the advice as "correct answer"

4 REPLIES
VIP Gold

SPA112 Keeping line open

The SPA112 can send "call has ended" signal to it only. It can use CPC or busy tone, for example.

But no way to force your device to go on-hook unless it decide to do it by self.

So read the device vendor documentation or ask vendor for support - you need to know what signal will trigger the on-hook of your device. Then you can ask here how to generate such signal on SPA112 ,,,

New Member

SPA112 Keeping line open

Thanks for the information Dan.  Our vendor has now advised me that the signal to trigger on hook is *#.  How can I generate these tones on call completion?

VIP Gold

SPA112 Keeping line open

Well, it's a challenge, somewhat. Althougt the "official answer" seems to be - it is not possible, I see a little chance.

You may know that DTMF signals are combination of two frequencies. * is 941Hz + 1209Hz; # is 941Hz + 1477Hz. And tones on SPA112 are configurable.

So try to configure the appropriate tone on SPA112 to sound exactly as DTMF's *# sequence.  Try this:

941@-5,1209@-5,1477@-5; 8(0.5/0.5/1+2,0.5/1/1+3)

If it will works, call me "Great Shaman" ;-)

... and mark the advice as "correct answer"

New Member

SPA112 Keeping line open

Thanks, this is now mostly working.  I have the ATA producing the *# tone rather than the initial off hook tone.  Once this has finished it's run time I do not get the off hook howler.  However I get 3 minutes of silence with a 30 second interval beep.  At the end of the 3 minutes the autodialler calls out to the backup number.  The line fully drops after termination of this second call.
This is not ideal but is accpetable.

Thanks again "Great Shaman" 

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