[asterisk-bugs] [JIRA] (ASTERISK-28843) res_rtp_asterisk: Duplicate detection of DTMF - Wideband codec / MS customisation
David Herselman (JIRA)
noreply at issues.asterisk.org
Sun Jan 22 09:09:03 CST 2023
[ https://issues.asterisk.org/jira/browse/ASTERISK-28843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=261230#comment-261230 ]
David Herselman edited comment on ASTERISK-28843 at 1/22/23 9:07 AM:
---------------------------------------------------------------------
Is there any likely hood of someone looking at this, with the current JIRA status flags (severity minor)?
I would like contribute in getting this bug fixed but my only apparent recourse is to contact a general development company and inquire if anyone knows C. I would naturally point them at the Coding Guidelines (https://wiki.asterisk.org/wiki/display/AST/Coding+Guidelines), is there any specific information that may be useful in hopefully getting the resulting patch submitted?
As an overview one has to most probably obtain the bitrate of the voice (main?) channel and then adjust the rtp->dtmf_timeout value in relation to the telephone-event bitrate. Would this need to be controlled by a switch somewhere or would this method of adjusting the timeout be accepted in to the codebase?
For what it's worth, this also (predictably) affects calls where PJSIP interfaces to Microsoft Teams Direct Router and negotiates opus:
Asterisk negotiates and sends this:
{noformat}
a=rtpmap:102 opus/48000/2
a=fmtp:102 useinbandfec=1
a=rtpmap:101 telephone-event/8000
{noformat}
Single '4' press results in Asterisk doing the following:
{noformat}
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027355, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027355, ts 416064690, len 000004, mark 1, event 00000004, end 0, duration 00160)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027357, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027357, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00320)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027360, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027360, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00480)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027363, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027363, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00800)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027365, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027365, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00960)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Sent RTP packet to 192.168.10.102:50012 (type 102, seq 010892, ts 101760, len 000139)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027367, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027367, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 01120)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027369, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027369, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 01280)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027371, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027371, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 01440)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027373, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027373, ts 416064690, len 000004, mark 0, event 00000004, end 1, duration 01600)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027374, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027374, ts 416064690, len 000004, mark 0, event 00000004, end 1, duration 01600)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP dropping duplicate or out of order DTMF END frame (seqno: 27374, ts 416064690, digit 4)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027375, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027375, ts 416064690, len 000004, mark 0, event 00000004, end 1, duration 01600)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP dropping duplicate or out of order DTMF END frame (seqno: 27375, ts 416064690, digit 4)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 102, seq 027404, ts 416101045, len 000012)
{noformat}
was (Author: bbs2web):
Is there any likely hood of someone looking at this, with the current JIRA status flags (severity minor)?
I would like contribute in getting this bug fixed but my only apparent recourse is to contact a general development company and inquire if anyone knows C. I would naturally point them at the Coding Guidelines (https://wiki.asterisk.org/wiki/display/AST/Coding+Guidelines), is there any specific information that may be useful in hopefully getting the resulting patch submitted?
As an overview one has to most probably obtain the bitrate of the voice (main?) channel and then adjust the rtp->dtmf_timeout value in relation to the telephone-event bitrate. Would this need to be controlled by a switch somewhere or would this method of adjusting the timeout be accepted in to the codebase?
For what it's worth, this also (predictably) affects calls where PJSIP interfaces to Microsoft Teams Direct Router and negotiates opus:
Asterisk negotiates and sends this:
```
a=rtpmap:102 opus/48000/2
a=fmtp:102 useinbandfec=1
a=rtpmap:101 telephone-event/8000
```
Single '4' press results in Asterisk doing the following:
```
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027355, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027355, ts 416064690, len 000004, mark 1, event 00000004, end 0, duration 00160)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027357, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027357, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00320)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027360, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027360, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00480)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027363, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027363, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00800)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027365, ts 416064690, len 000008)
[2023-01-22 15:35:37] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027365, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 00960)
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:37] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Sent RTP packet to 192.168.10.102:50012 (type 102, seq 010892, ts 101760, len 000139)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027367, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027367, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 01120)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027369, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027369, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 01280)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027371, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027371, ts 416064690, len 000004, mark 0, event 00000004, end 0, duration 01440)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating BEGIN DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027373, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027373, ts 416064690, len 000004, mark 0, event 00000004, end 1, duration 01600)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP creating END DTMF Frame: 52 (4), at 192.168.10.102:50012
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027374, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027374, ts 416064690, len 000004, mark 0, event 00000004, end 1, duration 01600)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP dropping duplicate or out of order DTMF END frame (seqno: 27374, ts 416064690, digit 4)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 101, seq 027375, ts 416064690, len 000008)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.102:50012 (type 101, seq 027375, ts 416064690, len 000004, mark 0, event 00000004, end 1, duration 01600)
[2023-01-22 15:35:38] DEBUG[30845][C-00000c90] res_rtp_asterisk.c: (0x7f2ca01c9920) RTP dropping duplicate or out of order DTMF END frame (seqno: 27375, ts 416064690, digit 4)
[2023-01-22 15:35:38] VERBOSE[30845][C-00000c90] res_rtp_asterisk.c: Got RTP packet from 192.168.10.102:50012 (type 102, seq 027404, ts 416101045, len 000012)
```
> res_rtp_asterisk: Duplicate detection of DTMF - Wideband codec / MS customisation
> ---------------------------------------------------------------------------------
>
> Key: ASTERISK-28843
> URL: https://issues.asterisk.org/jira/browse/ASTERISK-28843
> Project: Asterisk
> Issue Type: Bug
> Security Level: None
> Components: Resources/res_rtp_asterisk
> Affects Versions: 16.9.0
> Environment: CentOS 7.5
> Sangoma 7 FreePBX Distro on KVM guest
> PJSIP trunk to Microsoft Teams
> IAX2 trunk to Office PBX
> Reporter: David Herselman
> Assignee: Unassigned
> Attachments: compare_rtp_asterisk.png, iax2_forwarded.png, [MS-DTMF].pdf, out-1980-27117211904-20200419-093244-1587281564.10.mp3, teams-dtmf-g729-compact-nodebug.txt, teams-dtmf-g729-debug.txt, teams-dtmf-silk16-compact-nodebug.txt, teams-dtmf-silk16-debug.txt, teams_silk16.zip, Wireshark_screenshot.png
>
>
> Asterisk interprets double DTMF rfc2833 key presses, only when using a wide band (16 KHz) audio codec such as silk16. A comparative narrow band (8 KHz) g729 call works perfectly.
> \\
> \\
> I couldn't find an existing bug report in JIRA but did find the following discussion on the IETF mailing list back in 2006. It appears to debates some of the nuances around handling calls where audio and telephone-event messages negotiate different timestamp frequencies, mainly relating to packet loss in those situations:
> https://mailarchive.ietf.org/arch/msg/avt/Hx8rEwIQr9FYrTjP8D-TK41XCag/
> \\
> \\
> Microsoft's implementation amends rfc4733 but I couldn't discern anything in the document which explains why digits would get recognised twice. I've uploaded Microsoft's documentation as part of this report.
> \\
> \\
> One possible clue in the debug log may be that encoding is trying to run at 320 samples/second instead of 160 and therefor may interpret a single dtmf tone as two events.
> \\
> \\
> \\
> Problem summary:
> {quote}
> Duplicate rfc2833 DTMF events detected when using wideband codec {{SILK/16000}} together with {{telephone-event/8000}}
> {quote}
> \\
> \\
> In both of the following examples an incoming Teams Direct Route call from +27115551904 arrives on Asterisk for a destination of 1980 which is reachable via IAX2. A single '8' key press is sent a couple seconds after call establishment.
> \\
> \\
> {panel:title=Duplicate DTMF with wide band codec}
> {noformat}
> SIP/2.0 200 OK
> Via: SIP/2.0/TLS 52.114.76.76:5061;rport=8256;received=52.114.76.76;branch=z9hG4bK7bd2d1d3
> Call-ID: 10b73fc68209572abdd9757dfc509e5f
> From: "David Herselman" <sip:+27115551904 at sip.pstnhub.microsoft.com;user=phone>;tag=7ac926eb533041e79123af4a702621b6
> To: <sip:1980 at asterisk.company.co.za>;tag=1ff1ddc8-3608-46ec-a353-9cac40ca8098;user=phone
> CSeq: 2 INVITE
> Contact: <sip:asterisk.company.co.za:5061;transport=TLS>
> Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
> Supported: 100rel, timer, replaces, norefersub
> Server: FPBX-15.0.16.49(16.9.0)
> Content-Type: application/sdp
> Content-Length: 826
> v=0
> o=- 0 3 IN IP4 196.1.1.1
> s=Asterisk
> c=IN IP4 196.1.1.1
> t=0 0
> m=audio 13124 RTP/SAVP 104 18 0 8 101
> a=crypto:1 AES_CM_128_HMAC_SHA1_32 inline:lnIADcidXdqNLxecqAZc/5LUEGleofDQ1x951fe6
> a=ice-ufrag:40c679ae5ecfef5e43f0fb86063d6fed
> a=ice-pwd:2349eab80869ed7f7be1d42f3eff26d8
> a=candidate:Hc0a81407 1 UDP 2130706431 192.168.20.7 13124 typ host
> a=candidate:S294f175b 1 UDP 1694498815 196.1.1.1 13124 typ srflx raddr 192.168.20.7 rport 13124
> a=candidate:Hc0a81407 2 UDP 2130706430 192.168.20.7 13125 typ host
> a=candidate:S294f175b 2 UDP 1694498814 196.1.1.1 13125 typ srflx raddr 192.168.20.7 rport 13125
> a=rtpmap:104 SILK/16000
> a=rtpmap:18 G729/8000
> a=fmtp:18 annexb=no
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=ptime:20
> a=maxptime:100
> a=sendrecv
> Lots of these:
> [2020-04-19 09:12:49] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 104, seq 015233, ts 48369872, len 000064)
> [2020-04-19 09:12:49] DEBUG[22953][C-00000004] audiohook.c: Failed to get 320 samples from write factory 0x7fa6800729c8
> [2020-04-19 09:12:49] DEBUG[22953][C-00000004] audiohook.c: Read factory 0x7fa680071f88 and write factory 0x7fa6800729c8 both fail to provide 320 samples
> [2020-04-19 09:12:49] DEBUG[22954][C-00000004] translate.c: Sample size different 320 vs 160
> Makes it super confusing that debug messages appear twice but the RTP type 101 packets are detected twice as well:
> [davidh at sipteams ~]# grep -e 'type 101' -e 2833 -e DTMF teams-dtmf-silk16-debug.txt;
> [2020-04-19 09:12:48] DEBUG[22952][C-00000004] dahdi/bridge_native_dahdi.c: Channel 'IAX2/Office-28115' has DTMF hooks.
> [2020-04-19 09:12:49] DEBUG[22952][C-00000004] dahdi/bridge_native_dahdi.c: Channel 'IAX2/Office-28115' has DTMF hooks.
> [2020-04-19 09:12:49] DEBUG[22952][C-00000004] dahdi/bridge_native_dahdi.c: Channel 'IAX2/Office-28115' has DTMF hooks.
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015285, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015285, ts 48386209, len 000004, mark 1, event 00000008, end 0, duration 00160)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: Creating BEGIN DTMF Frame: 56 (8), at 192.168.10.53:50010
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin '8' received on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin '8' received on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin passthrough '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin passthrough '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015287, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015287, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 00320)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015288, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015288, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 00480)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015290, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015290, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 00640)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015293, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015293, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 00800)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015294, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015294, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 00960)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015297, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015297, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 01120)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015298, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015298, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 01280)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: Creating END DTMF Frame: 56 (8), at 192.168.10.53:50010
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000003, duration 80 ms
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000003, duration 80 ms
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end accepted with begin '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end accepted with begin '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end passthrough '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end passthrough '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015301, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015301, ts 48386209, len 000004, mark 0, event 00000008, end 0, duration 01440)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: Creating BEGIN DTMF Frame: 56 (8), at 192.168.10.53:50010
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin '8' received on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin '8' received on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin ignored '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin ignored '8' on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015302, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015302, ts 48386209, len 000004, mark 0, event 00000008, end 1, duration 01600)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: Creating END DTMF Frame: 56 (8), at 192.168.10.53:50010
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000003, duration 100 ms
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000003, duration 100 ms
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000003, duration 100 ms
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000003, duration 100 ms
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin emulation of '8' with duration 100 queued on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] DTMF[22952][C-00000004] channel.c: DTMF begin emulation of '8' with duration 100 queued on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015303, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015303, ts 48386209, len 000004, mark 0, event 00000008, end 1, duration 01600)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: Dropping duplicate or out of order DTMF END frame (seqno: 15303, ts 48386209, digit 8)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50010 (type 101, seq 015304, ts 48386209, len 000008)
> [2020-04-19 09:12:50] VERBOSE[22952][C-00000004] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50010 (type 101, seq 015304, ts 48386209, len 000004, mark 0, event 00000008, end 1, duration 01600)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:12:50] DEBUG[22952][C-00000004] res_rtp_asterisk.c: Dropping duplicate or out of order DTMF END frame (seqno: 15304, ts 48386209, digit 8)
> [2020-04-19 09:12:51] DTMF[22952][C-00000004] channel.c: DTMF end emulation of '8' queued on PJSIP/msteams_sip1-00000003
> [2020-04-19 09:12:51] DTMF[22952][C-00000004] channel.c: DTMF end emulation of '8' queued on PJSIP/msteams_sip1-00000003
> {noformat}
> {panel}
> \\
> {panel:title=Normal DTMF with narrow band codec}
> {noformat}
> SIP/2.0 200 OK
> Via: SIP/2.0/TLS 52.114.76.76:5061;rport=5128;received=52.114.76.76;branch=z9hG4bKc8bff66f
> Call-ID: dd815213b70b54f089971b041274c997
> From: "David Herselman" <sip:+27115551904 at sip.pstnhub.microsoft.com;user=phone>;tag=61b1845891d0438eaee84bc79a046d45
> To: <sip:1980 at asterisk.company.co.za>;tag=6c64f330-1893-4017-9bc7-873c17c91ffd;user=phone
> CSeq: 2 INVITE
> Contact: <sip:asterisk.company.co.za:5061;transport=TLS>
> Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
> Supported: 100rel, timer, replaces, norefersub
> Server: FPBX-15.0.16.49(16.9.0)
> Content-Type: application/sdp
> Content-Length: 797
> v=0
> o=- 0 3 IN IP4 196.1.1.1
> s=Asterisk
> c=IN IP4 196.1.1.1
> t=0 0
> m=audio 13458 RTP/SAVP 18 0 8 101
> a=crypto:1 AES_CM_128_HMAC_SHA1_32 inline:2/fmRbQY0aix4uUxrTe8KqtxP6R/JJaUUGBNMuvP
> a=ice-ufrag:416688807842f6a42f605d0975eeae8a
> a=ice-pwd:3420f1fc1acc461f1c018dc41640f589
> a=candidate:Hc0a81407 1 UDP 2130706431 192.168.20.7 13458 typ host
> a=candidate:S294f175b 1 UDP 1694498815 196.1.1.1 13458 typ srflx raddr 192.168.20.7 rport 13458
> a=candidate:Hc0a81407 2 UDP 2130706430 192.168.20.7 13459 typ host
> a=candidate:S294f175b 2 UDP 1694498814 196.1.1.1 13459 typ srflx raddr 192.168.20.7 rport 13459
> a=rtpmap:18 G729/8000
> a=fmtp:18 annexb=no
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=ptime:20
> a=maxptime:150
> a=sendrecv
> DTMF works perfectly and isn't detected twice, although debug lines still print things twice:
> [davidh at sipteams ~]# grep -e 'type 101' -e 2833 -e DTMF teams-dtmf-g729-debug.txt;
> [2020-04-19 09:32:45] DEBUG[26873][C-00000006] dahdi/bridge_native_dahdi.c: Channel 'IAX2/Office-28327' has DTMF hooks.
> [2020-04-19 09:32:45] DEBUG[26873][C-00000006] dahdi/bridge_native_dahdi.c: Channel 'IAX2/Office-28327' has DTMF hooks.
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012003, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012003, ts 480000275, len 000004, mark 1, event 00000008, end 0, duration 00160)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: Creating BEGIN DTMF Frame: 56 (8), at 192.168.10.53:50006
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF begin '8' received on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF begin '8' received on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF begin passthrough '8' on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF begin passthrough '8' on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012005, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012005, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 00320)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012007, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012007, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 00480)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012009, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012009, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 00640)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012011, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012011, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 00800)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012013, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012013, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 00960)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012015, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012015, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 01120)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012017, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012017, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 01280)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012019, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012019, ts 480000275, len 000004, mark 0, event 00000008, end 0, duration 01440)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012021, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012021, ts 480000275, len 000004, mark 0, event 00000008, end 1, duration 01600)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: Creating END DTMF Frame: 56 (8), at 192.168.10.53:50006
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000005, duration 200 ms
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF end '8' received on PJSIP/msteams_sip1-00000005, duration 200 ms
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF end accepted with begin '8' on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF end accepted with begin '8' on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF end passthrough '8' on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] DTMF[26873][C-00000006] channel.c: DTMF end passthrough '8' on PJSIP/msteams_sip1-00000005
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012022, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012022, ts 480000275, len 000004, mark 0, event 00000008, end 1, duration 01600)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: Dropping duplicate or out of order DTMF END frame (seqno: 12022, ts 480000275, digit 8)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP packet from 192.168.10.53:50006 (type 101, seq 012023, ts 480000275, len 000008)
> [2020-04-19 09:32:47] VERBOSE[26873][C-00000006] res_rtp_asterisk.c: Got RTP RFC2833 from 192.168.10.53:50006 (type 101, seq 012023, ts 480000275, len 000004, mark 0, event 00000008, end 1, duration 01600)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: - RTP 2833 Event: 00000008 (len = 4)
> [2020-04-19 09:32:47] DEBUG[26873][C-00000006] res_rtp_asterisk.c: Dropping duplicate or out of order DTMF END frame (seqno: 12023, ts 480000275, digit 8)
> {noformat}
> {panel}
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