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klijent je aastra 53i

na linksys Phone Adapter with 2 Ports for Voice-Over-IP imam DTMF process AVT

http://forum.voxalot.com/voxalot-support/1046-inband-dtmf-voicemail.htm

Aside from DTMF Tx Method (set to Inband), the SPA3000 also has a "DTMF Process AVT" setting (default is Yes). If it's set to No, the AVT (RFC2833) payload type will not be included in outbound SDP. It seems reasonable to me (though I'm no expert) to keep it set to Yes even if using Inband DTMF, in order to process incoming RFC2833 signals.

bilo je YES, ja sam setovao na NO

na telefonu Siemens bežičnom podešenje je::

Telephony->advanced settings:

DTMF over VoIP connections
Send settings:      off Audio   on RFC 2833   on SIP Info

kada sam isključio RFC2833 onda je trensfer proradio

dakle, trenutne postavke

DTMF over VoIP connections
Send settings:      off Audio   off RFC 2833   on SIP Info

http://lists.digium.com/pipermail/asterisk-users/2005-August/114531.html

Sherwood McGowan wrote:
> I'll pass that on to my lead engineer, he was under the assumption that
> rfc2833 was too unreliable. I personally don't know, but will look further
> into the matter. 

You need a new engineer.  OOB DTMF like RFC2833 is more reliable than 
inband.  With inband even a tiny audio glitch while the user is sending 
DTMF can mess things up.

jutros na pap2 razgovaram sa bakirom koji ima pravo visoke tonove u svom glasu :) i sve se to pretvara u DTMF tonove

In the PAP2, you can set the DTMF volume and length.
Mine is:

vratio DTMF Method = ATV (a to je ustvari rfc2833). takođe stavio u sip.conf na ext 12 i 13 (pap2 telefon) "dtmfmode=rfc2833"

testirao blind transfer kada je ovo podešenje (#0 pa 60# radi transfera na echotest ekstenziju) i to radi