[SIPForum-discussion] DTMF related sequences
Andrew Yu
andrew at asiatel.com.sg
Mon Sep 3 16:33:54 UTC 2007
Hi Gopa,
All service providers that I know of, support RFC2833(out of band) for
sending DTMF, SIP INFO is fast becoming the standard for sending DTMF as
it is more reliable. Your provider's SIP to PSTN gateway will translate
DMTF signals into DMFT tones for PSTN when calling IVR systems.
The reliability of DTMF transmission depend of the following factors:
1. DTMF transmission method - from most reliable to least reliable
(SIP INFO, RFC2833, Inband)
2. Routes used for termination, service providers that use poor
quality routes for termination will not be able to deliver DTMF
signaling properly
3. Configuration & quality of the PSTN-SIP gateway used for PSTN
termination
I hope this explains...
--
Cheers,
Asiatel Singapore Pte Ltd
Andrew Yu
19 Jalan Kilang Barat
#06-01, Acetech Centre
Singapore 159361
Tel: +65 6271 8233
Fax: +65 6274 4266
Gopalarathnam Sambasivan wrote:
> Hello Andrew, Halit, All,
> consider a real network where a SIP phone is newly in place.
> There will be traditional Interactive systems systems like Phone
> banking, Traditional voice mail servers,...
> (Voice mail server not yet supporting RFC3265 - MWI will not work for
> SIP subscrs) which rely on in-band DTMF recognition for connecting the
> call actually (entering customer id, PIN and all ) although call is
> connected from service provider point of view.
>
> Can you please let me know what emerging service providers like both
> in-band DTMF ( via some RTP standards
> to make DTMF transmissions in IP reliable?? )
> and out of band DTMF by SIP info method both to be available or just
> are satisfied with SIP INFO method??
>
> I do not have a real network existing with SIP phone service providers.
> Can you please provide a view from end-user and service provider
> perspective.
>
> Thanks and Best Regards,
> Gopalarathnam.
>
> On 8/2/07, *Arias, Marcelo (Marcelo)* <marias at avaya.com
> <mailto:marias at avaya.com>> wrote:
>
> it does, AVAYA control DTMF under SIP protocol
>
>
> Marcelo Arias|Services Director Southern Cone| Avaya |
> _marias at avaya.com <mailto:marias at avaya.com>_|
>
>
>
> ------------------------------------------------------------------------
> *From:* discussion-bounces at sipforum.org
> <mailto:discussion-bounces at sipforum.org> [mailto:
> discussion-bounces at sipforum.org
> <mailto:discussion-bounces at sipforum.org>] *On Behalf Of *Halit Sakca
> *Sent:* Miércoles, 01 de Agosto de 2007 05:03 p.m.
> *To:* andrew at asiatel.com.sg <mailto:andrew at asiatel.com.sg>;
> Francisco del rosario
> *Cc:* discussion at sipforum.org <mailto:discussion at sipforum.org>
>
> *Subject:* Re: [SIPForum-discussion] DTMF related sequences
>
>
> yes, exact solution is the changing the phone but Andrew I think
> he uses the PSTN so may be its better to change gateway(if its
> available :) like audiocodes or sth like that) but its possiblity
> is less than POTS client's possibility,
> may be the electronical arhitecture of PSTN is broken (like
> closed-circuit for 8 and 0 some times ).
>
> by the way does it matter to use Avaya or not for this solution :)
>
> regards,
> halit
>
>
>
>
>
> ------------------------------------------------------------------------
>
> > Date: Wed, 1 Aug 2007 19:38:05 +0800
> > From: andrew at asiatel.com.sg <mailto:andrew at asiatel.com.sg>
> > To: kit_del_rosario at yahoo.com <mailto:kit_del_rosario at yahoo.com>
> > CC: discussion at sipforum.org <mailto:discussion at sipforum.org>
> > Subject: Re: [SIPForum-discussion] DTMF related sequences
> >
> > Hmm...if it's SIP telephone adapter...perhaps the telephone is
> fault,
> > try change to another telephone. Try using SIP INFO for sending DTMF
> > digits...it's more reliable. Let us know how you setup your
> endpoint and
> > what that you're using. You can try isolating the problem by
> using a SIP
> > ip-phone then an adapter to ensure the analog phone is not the
> cause of
> > the problem.
> >
> > Francisco del rosario wrote:
> > > Hi Experts :
> > >
> > > Can anyone make some sense on what's causing this lot of DTMF
> > > exchanges ???
> > >
> > > |Time | 58.84.238.73 <http://58.84.238.73/> | 58.84.238.84
> <http://58.84.238.84/> |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |468.755 | INVITE SDP ( g711U g721 g723 g711A g729
> > > G726-4...726-24 G726-) |SIP From:
> > >
> > > | |(5060) ------------------> (5061) |
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > |468.772 | 100 Trying| |SIP Status
> > >
> > >
> > >
> > >
> > >
> > >
> > > | |(5060) <------------------ (5061) |
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > |468.779 | 180 Ringing |SIP Status
> > >
> > >
> > >
> > >
> > >
> > >
> > > | |(5060) <------------------ (5061) |
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > |468.786 | 200 OK SDP ( g711U NSE telephone-event)
> > > |SIP Status
> > >
> > >
> > >
> > > | |(5060) <------------------ (5061) |
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > |468.794 | ACK | |SIP Request
> > >
> > >
> > >
> > >
> > >
> > >
> > > | |(5060) ------------------> (5061) |
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > |468.820 | RTP (g711U) |RTP Num
> > > packets:118 Duration:3.510s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |468.824 | RTP (g711U) |RTP Num
> > > packets:4417 Duration:137.596s SSRC:0x89E6C978
> > >
> > > | |(16394) <------------------ (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |472.412 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.070s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |472.531 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |472.611 | RTP (telephone-event) DTMF Eight 8 |RTP
> > > Num packets:6 Duration:0.071s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |472.731 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |472.811 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.069s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |472.931 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.011 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.069s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.132 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.212 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.069s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.331 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.411 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.071s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.531 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.611 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.069s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.731 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.821 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.059s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |473.931 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |474.022 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.059s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |474.131 | RTP (g711U) |RTP Num packets:1
> > > Duration:0.000s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |474.221 | RTP (telephone-event) DTMF Zero 0 |RTP
> > > Num packets:6 Duration:0.071s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |474.341 | RTP (g711U) |RTP Num
> > > packets:1831 Duration:54.904s SSRC:0xF9681F37
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |529.315 | RTP (telephone-event) DTMF Eight 8 |RTP
> > > Num packets:8 Duration:0.130s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |529.495 | RTP (g711U) |RTP Num
> > > packets:1254 Duration:37.593s SSRC:0xF9681F37
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |567.178 | RTP (telephone-event) DTMF Eight 8 |RTP
> > > Num packets:9 Duration:0.159s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |567.388 | RTP (g711U) |RTP Num
> > > packets:1043 Duration:31.262s SSRC:0xF9681F37
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |598.720 | RTP (telephone-event) DTMF Eight 8 |RTP
> > > Num packets:9 Duration:0.140s SSRC:0xF9681F37
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |598.910 | RTP (g711U) |RTP Num
> > > packets:251 Duration:7.500s SSRC:0xF9681F37
> > >
> > >
> > > | |(16394) ------------------> (16480) |
> > >
> > >
> > >
> > >
> > >
> > >
> > > |606.431 | BYE | |SIP Request
> > >
> > >
> > >
> > >
> > >
> > >
> > > | |(5060) ------------------> (5061) |
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > |606.436 | 200 OK | |SIP Status
> > >
> > >
> > >
> > >
> > >
> > >
> > > | |(5060) <------------------ (5061) |
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Your kind advices is well appreciated...
> > >
> > >
> ------------------------------------------------------------------------
>
> > > Shape Yahoo! in your own image. Join our Network Research Panel
> today!
> > > <
> http://us.rd.yahoo.com/evt=48517/*http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7>
>
> > >
> > >
> ------------------------------------------------------------------------
> > >
> > > _______________________________________________
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> > > Post to the list at discussion at sipforum.org
> <mailto:discussion at sipforum.org>
> > >
> >
> >
> > --
> > Cheers,
> >
> > Asiatel Singapore Pte Ltd
> > Andrew Yu
> >
> > 19 Jalan Kilang Barat
> > #06-01, Acetech Centre
> > Singapore 159361
> >
> > Tel: +65 6271 8233
> > Fax: +65 6274 4266
> >
> > _______________________________________________
> > This is the SIP Forum discussion mailing list
> > TO UNSUBSCRIBE, or edit your delivery options, please visit
> http://sipforum.org/mailman/listinfo/discussion
> > Post to the list at discussion at sipforum.org
> <mailto:discussion at sipforum.org>
>
>
> ------------------------------------------------------------------------
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