[Asterisk-Dev] DTMF and cisco 7960/7940

[Sergio]

I'm working on RFC2833 and ast_rtp_senddigit function cause I have an 
issue on cisco 7960. cisco 7905 is working good.
http://bugs.digium.com/bug_view_page.php?bug_id=0003910
It seems not to play correctly the incoming RTP DTMF packets (rfc2833), 
so I dunno if the problem is related to the cisco firmware or maybe the 
ast_rtp_senddigit

can someone please try this dialplan example on cisco 7940 or 7960?
exten => 8603,1,Answer(1)
exten => 8603,n,Wait(1)
exten => 8603,n,sipdtmfmode(rfc2833)
exten => 8603,n,SendDTMF(1)
exten => 8603,n,Wait(3)
exten => 8603,n,SendDTMF(2)
exten => 8603,n,hangup()

I can hear tones on cisco 7905, none on cisco 7960
Thanks