[asterisk-bugs] [JIRA] (ASTERISK-17581) rtpkeepalive blocks incoming DTMF periodically

[Joshua Colp (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-17581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joshua Colp updated ASTERISK-17581:
-----------------------------------

    Affects Version/s: 13.18.4

> rtpkeepalive blocks incoming DTMF periodically
> ----------------------------------------------
>
>                 Key: ASTERISK-17581
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-17581
>             Project: Asterisk
>          Issue Type: Bug
>          Components: Core/RTP
>    Affects Versions: 1.4.40, 13.18.4
>            Reporter: geejay
>
> When rtpkeepalive is not zero then comfort noise packets are sent periodically. During sending of comfort noise packets incoming DTMF is not processed.
> These DMTF tones are lost.
> The Function ast_rtp_sendcng in rtp.c mutes DTMF for a certain period here:
> rtp->dtmfmute = ast_tvadd(ast_tvnow(), ast_tv(0, 500000)); 
> DMTF tones received during this period are not processed by Asterisk. 
> I verified the problem in Asterisk 1.4.40. The code 1.6.2.17.1 seems to be the same.
> ****** ADDITIONAL INFORMATION ******
> RTP debug. The first "5" DTMF tone is processed by Asterisk but the second "5" is ignored because Asterisk sends comfort noise.
> Got  RTP packet from    200.21.22.9:21196 (type 101, seq 044204, ts 1634395254, len 000004)
> Got  RTP RFC2833 from   200.21.22.9:21196 (type 101, seq 044204, ts 1634395254, len 000004, mark 1, event 00000005, end 0, duration 00000)
> [Mar 19 09:38:28] DTMF[21798]: channel.c:2530 __ast_read: DTMF begin '5' received on SIP/xswitch-000003ba
> [Mar 19 09:38:28] DTMF[21798]: channel.c:2534 __ast_read: DTMF begin ignored '5' on SIP/xswitch-000003ba
> Got  RTP packet from    200.21.22.9:21196 (type 101, seq 044205, ts 1634395254, len 000004)
> Got  RTP RFC2833 from   200.21.22.9:21196 (type 101, seq 044205, ts 1634395254, len 000004, mark 0, event 00000005, end 1, duration 01920)
> [Mar 19 09:38:28] DTMF[21798]: channel.c:2449 __ast_read: DTMF end '5' received on SIP/xswitch-000003ba, duration 240 ms
> [Mar 19 09:38:28] DTMF[21798]: channel.c:2515 __ast_read: DTMF end passthrough '5' on SIP/xswitch-000003ba
> Got  RTP packet from    200.21.22.9:21196 (type 101, seq 044205, ts 1634395254, len 000004)
> Got  RTP RFC2833 from   200.21.22.9:21196 (type 101, seq 044205, ts 1634395254, len 000004, mark 0, event 00000005, end 1, duration 01920)
> Sent Comfort Noise RTP packet to 200.21.22.9:21196 (type 13, seq 30686, ts 0, len 1)
> Got  RTP packet from    200.21.22.9:21196 (type 101, seq 044206, ts 1634397174, len 000004)
> Got  RTP RFC2833 from   200.21.22.9:21196 (type 101, seq 044206, ts 1634397174, len 000004, mark 1, event 00000005, end 0, duration 00000)
> Got  RTP packet from    200.21.22.9:21196 (type 101, seq 044207, ts 1634397174, len 000004)
> Got  RTP RFC2833 from   200.21.22.9:21196 (type 101, seq 044207, ts 1634397174, len 000004, mark 0, event 00000005, end 1, duration 01680)
> Got  RTP packet from    200.21.22.9:21196 (type 101, seq 044207, ts 1634397174, len 000004)
> Got  RTP RFC2833 from   200.21.22.9:21196 (type 101, seq 044207, ts 1634397174, len 000004, mark 0, event 00000005, end 1, duration 01680)



--
This message was sent by Atlassian JIRA
(v6.2#6252)