> -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Andy Spitzer > Sent: Tuesday, April 06, 2010 10:59 AM > To: [email protected] > Cc: [email protected] > Subject: Re: [sipX-dev] sipXecs 18499 fowlerp: XX-7944 - only > valid keys can/will stop recording > > Woof! > > On Tue, Apr 6, 2010 at 9:47 AM, <[email protected]> wrote: > > XX-7944 - only valid keys can/will stop recording > > This is not a good idea. If DTMF gets into a recording, then > when it gets played back it can echo back and be detected as > if the far end pressed a digit. > > This is a lesson I learned the hard way a long time ago. > Here is the situation: > > Caller left a message, pressed '4'. As '4' wasn't the 'stop' > key, the audable DTMF tone got recorded into the message. > > The user called into to retrieve messages, and played back > this caller's message. The '4' DTMF digit was played (as it > was happily recorded). It echoed back weakly (side tone, or > analog hybrid, or for whatever reason there was a small > amount of echo back, like there is in the real world). As > '4' was the 'delete' message, the echoed back DTMF was > detected and acted on. The message deleted itself! This was > not an isolated incident, it occurred rarely, but frequently > enough to become a real problem. As you can imagine, it > wasn't easy to figure out what the actual problem was, as for > all reasonable checks it showed that the caller pressed 4. > > Unless there is a way to suppress the DTMF audio from the > recording, I suggest that you back out this change and force > any detected DTMF to end the recording, lest you suffer the > same problems going forward. > > --Woof! > _______________________________________________ > sipx-dev mailing list [email protected] List > Archive: http://list.sipfoundry.org/archive/sipx-dev > Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-dev > sipXecs IP PBX -- http://www.sipfoundry.org/
Thank you. You are absolutely right. Something we did not think of. We will back this out And mark the Jira as no fix planned. Peter _______________________________________________ sipx-dev mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-dev Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-dev sipXecs IP PBX -- http://www.sipfoundry.org/
