Supervised(attended) call transfer is not working

why supervised call transfer is not working???

i have fallowing dialplan:
in extenstion.conf
[default]
exten => 3000,1,Answer()
exten => 3000,n,Dial(SIP/3000,Tt)
exten => 3000,n,Hangup()

exten => 3001,1,Answer()
exten => 3001,n,Dial(SIP/3001,Tt)
exten => 3001,n,Hangup()

exten => 3002,1,Answer()
exten => 3002,n,Dial(SIP/3002,Tt)
exten => 3002,n,Hangup()

in feature.cof
[featuremap]
atxfer => *2

Please provide detailed logging, including DTMF logs and also the sip.conf settings, in particular dtmfmode.

i am calling from 3000 to 3001,While on conversation with another party, we dial the atxfer key *2 sequence in 3000 extension. Asterisk says “Transfer” then gives a dial tone, while putting the other party on hold(3001). we dial the transferee number 3002 in 3000 extension ,call goes to 3002 and call is established between 3000 and 3002.
Real call will established beween 3000 to 3001,but this one is not happened

sip.conf
[general]
port=5060
bindaddr=0.0.0.0
qualify=yes
directmedia=no
canreinvite=no
maxcallbitrate=384

[3000]
type=friend
username=vinay
secret=password
host=dynamic
nat=yes
busylevel=1
callcounter=yes
callerid=vinay <3000>
disallow=all
allow=alaw
allow=h263
videosupport=yes
canreinvite=no
maxcallbitrate=384
context=default
dtmfmode=rfc2833

[3001]
type=friend
username=kumar
secret=password
host=dynamic
nat=yes
busylevel=1
callcounter=yes
callerid=kumar <3001>
disallow=all
allow=alaw
allow=h263
videosupport=yes
canreinvite=no
maxcallbitrate=384
context=default
dtmfmode=rfc2833
what is DTMF logs???
[3002]
type=friend
username=3002
secret=1234
host=dynamic
nat=yes
busylevel=1
callcounter=yes
callerid=nuevo <3002>
disallow=all
allow=alaw
allow=h263
videosupport=yes
canreinvite=no
maxcallbitrate=384
context=default
dtmfmode=rfc2833

What are you doing to complete the transfer?

Note I’ve only used real SIP transfers, so I’m not very familiar with the features.conf method.

blind call transfer is working but supervised call transfer is not working…please you only give the hints.

thank you

That’s because you don’t give enough information to work out what you are doing wrong.

The other reason you might just get hints here is that people believe that they should be sufficient if you have read the documentation.

supervised call transfer working only with SIP phones,but for PSTN is not working…will PSTN phones support supervised call transfer???

thank you

features.conf transfers are channel technology independent - all they require is DTMF digits or their signalling equivalent.

thank you

once enter the DTMF call transfer sequence in PSTN phones,comes out of the asterisk execution(TDM error)…will need to write drivers???

Don’t understand.

features.conf transfers work on abstract channels that can pass audio and digits. Dahdi channels need the ablility to decode tones to digits for their normal operation.