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DTMF Not Sent RFC2833 When Keys Pressed Quickly - Printable Version

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DTMF Not Sent RFC2833 When Keys Pressed Quickly - kg4ysy - 02-11-2015 09:27 PM

I've noticed a problem with DTMF on the T32 when pressing keys quickly or for short durations. The phone itself adds the digit to the display and it plays the DTMF tone. When looking at the RTP stream, that digit isn't sent. I pressed the keys very quickly.

I'm attaching the pcap trace from the phone and a section of log file for this call. You can see that the phone log shows 4736# being recognized and sent. When looking at the pcap trace, you'll see that only 4736 was sent to the phone switch. I can switch to SIP INFO for DTMF, but I'd rather not. Any thoughts?

374725 Feb 11 13:13:46 192.168.1.184 syslog[414]: [0413] 146770851 [TALK][***CBaseRoutine::OnDTMFChanged***] iSendKey=4 m_eDTMFType=1
374741 Feb 11 13:13:46 192.168.1.184 syslog[414]: [0413] 146771025 [TALK][***CBaseRoutine::OnDTMFChanged***] iSendKey=7 m_eDTMFType=1
374761 Feb 11 13:13:53 192.168.1.184 syslog[414]: [0413] 146771204 [TALK][***CBaseRoutine::OnDTMFChanged***] iSendKey=3 m_eDTMFType=1
374777 Feb 11 13:13:53 192.168.1.184 syslog[414]: [0413] 146771374 [TALK][***CBaseRoutine::OnDTMFChanged***] iSendKey=6 m_eDTMFType=1
374795 Feb 11 13:13:53 192.168.1.184 syslog[414]: [0413] 146771485 [TALK][***CBaseRoutine::OnDTMFChanged***] iSendKey=11 m_eDTMFType=1


RE: DTMF Not Sent RFC2833 When Keys Pressed Quickly - James_Yealink - 02-12-2015 02:19 PM

Hi,

The problem should only happen when two DTMF are inputted very quickly.
Unfortunatelly there is no an option can decrease DTMF duration in T32. You may have to make your input a little slow or change the DTMF type.

Sorry for this inconvenience.

Regards,
James


RE: DTMF Not Sent RFC2833 When Keys Pressed Quickly - aron - 03-21-2015 05:43 AM

(02-12-2015 02:19 PM)Yealink_James Wrote:  Hi,

The problem should only happen when two DTMF are inputted very quickly.
Unfortunatelly there is no an option can decrease DTMF duration in T32. You may have to make your input a little slow or change the DTMF type.

Sorry for this inconvenience.

Regards,
James

Very sad to hear so, as this very quick is not so quick though. please define what very quick should mean? I consider the gap between 1 key press to the other to be long enough that the rfc2833 events should able to be generated reliably.


RE: DTMF Not Sent RFC2833 When Keys Pressed Quickly - aron - 03-24-2015 12:16 AM

same for t28 and t26


RE: DTMF Not Sent RFC2833 When Keys Pressed Quickly - James_Yealink - 03-24-2015 12:29 AM

Hi Aron,

What's the firmware of T28 and T26 in your side?
Please upgrade them to latest firmware(V73) and check again.

Regards,
James