[asterisk-users] asterisk 1.6.2.0 sip channel to sip channel call dtmf inband not work.

[zhao xiaojing]

we tested asterisk 1.6.2.0,  found that

when call from  one sip_channel to  another sip_channel , 
------------------------------------------------------------------
exten => _X.,1,Noop()
exten => _X.,n,Dial(SIP/${EXTEN},50,TtgM)
------------------------------------------------------------------

in asterisk 1.6.2.0 ,when sip user config to use 
dtmfmode=rfc2833 , it's ok, but when both users 
config to use dtmfmode=inband, cannot detect the 
dtmf and trigger the feature config.

but in asterisk 1.4.26 or above.  it work well. 

it is a bug in 1.6.2.0 ?
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zhao 
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