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SIP and incoming DTMF tones

SIP and incoming DTMF tones

SIP and incoming DTMF tones


I have a program, Win-911 that calls phone numbers when it is triggered. That part is working thanks to Fodrod and CoralTech; https://www.tek-tips.com/viewthread.cfm?qid=181819.... To acknowledge the alarm I can enter a code on the phone. That part is not working. I enter the code, but Win-911 doesn't recognize it. Are there some settings I can check? I am running a SV9100:
WebPro 11.00.00
Main Software 11.00.52


RE: SIP and incoming DTMF tones

Look at 15-03-03.

RE: SIP and incoming DTMF tones

Thank you for the suggestion. The user still cannot acknowledge the alarms. Are there some sort of logs I can look at?

RE: SIP and incoming DTMF tones

Your out of band signaling for SIP isn't setup then.

RE: SIP and incoming DTMF tones

As CoralTech rightly noted, 15-03-03 must be set to 'Special' for your SIP endpoint Win911 to get RTP Events (DTMF). You should run a Wireshark on that machine's interface and watch Wireshark when the called party dials digits. Dial a fixed known sequence so you can track it in Wireshark. Once you've stopped that capture, go to Telephony/VoIP Calls/ highlight the stream and click 'Flow Sequence.' You should see the RTP/DTMF events showing which digits were pressed. If you're testing with a generic SIP endpoint like MicroSIP or a 3CX softphone, you won't hear the DTMF digits because they are out-of-band. You also might check if your 84-34 settings for SIP Extension are RFC2833 and payload 101. but I don't thing they are strictly necessary for this particular usage.
The next question would be - Does Win911 recognize them?

RE: SIP and incoming DTMF tones

BTW, if you're testing with MicroSIP you may already know to 'Allow IP Rewrite' since RTP is coming from the IP address of the NEC VOIP DSP interface address, not the VOIP control interface.

RE: SIP and incoming DTMF tones

Ok, slight correction. MicroSIP actually interprets the RTP Events and presents them audibly, whereas 3CX does not. Go figure.

RE: SIP and incoming DTMF tones

I have it working now. My VoIPDB DTMF was not setup. CoralTech was a real help in getting this resolved.

RE: SIP and incoming DTMF tones

CoralTech was a real help in getting this resolved.

There's a "Great post" link... just sayin'. :)

Just my $.02

"What the captain doesn't realize is that we've secretly replaced his Dilithium Crystals with new Folger's Crystals."


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