#########iax.conf
[402]
;Informatica
username=402
type=friend
host=dynamic
secret=secret
context=internacional
pickupgroup=7
callgroup=7
dtmfmode=inband
mailbox=402@default
disallow=all
allow=alaw
allow=gsm

[403]
;Informatica
username=403
type=friend
host=dynamic
secret=secret
context=internacional
callgroup=7
pickupgroup=7
mailbox=403@default
disallow=all
allow=alaw
allow=gsm

[404]
;Informatica
username=404
type=friend
host=dynamic
secret=secret
context=internacional
callgroup=7
pickupgroup=7
mailbox=404@default
disallow=all
allow=alaw
allow=gsm

[405]
;Informatica
username=405
type=friend
host=dynamic
secret=secret
context=internacional
callgroup=7
pickupgroup=7
dtmfmode=inband
mailbox=405@default
disallow=all
allow=alaw
allow=gsm

[408]
;Informatica
username=408
type=friend
host=dynamic
secret=secret
context=internacional
callgroup=7
pickupgroup=7
dtmfmode=inband
mailbox=408@default
disallow=all
allow=alaw
allow=gsm
############################################

#######features.conf
;
; Sample Parking configuration
;

[general]
parkext => 700                  ; What extension to dial to park
parkpos => 701-720              ; What extensions to park calls on. These needs to be
                                ; numeric, as Asterisk starts from the start position
                                ; and increments with one for the next parked call.
context => parkedcalls          ; Which context parked calls are in
;parkingtime => 45              ; Number of seconds a call can be parked for
                                ; (default is 45 seconds)
;transferdigittimeout => 3      ; Number of seconds to wait between digits when transfering a call
;courtesytone = beep            ; Sound file to play to the parked caller
                                ; when someone dials a parked call
;xfersound = beep               ; to indicate an attended transfer is complete
;xferfailsound = beeperr        ; to indicate a failed transfer
;adsipark = yes                 ; if you want ADSI parking announcements
;findslot => next               ; Continue to the 'next' free parking space.
                                ; Defaults to 'first' available
pickupexten = *5                ; Configure the pickup extension.  Default is *8
;featuredigittimeout = 500      ; Max time (ms) between digits for
                                ; feature activation.  Default is 500


[featuremap]
;blindxfer => #1                ; Blind transfer
;disconnect => *0               ; Disconnect
automon => *1                   ; One Touch Record
atxfer => *2                    ; Attended transfer

[applicationmap]
; Note that the DYNAMIC_FEATURES channel variable must be set to use the features
; defined here.  The value of DYNAMIC_FEATURES should be the names of the features
; to allow the channel to use separated by '#'.  For example:
;    Set(DYNAMIC_FEATURES=myfeature1#myfeature2#myfeature3)
;
;testfeature => #9,callee,Playback,tt-monkeys   ;Play tt-monkeys to
                                                ;callee if #9 was pressed

####################################################
------
I did a reload on res_features.so
I also tried to change dtmfmode between rfc2833 and inband, with no sucess...


CLI output:
    -- Accepting AUTHENTICATED call from 192.168.4.139:
       > requested format = alaw,
       > requested prefs = (),
       > actual format = alaw,
       > host prefs = (alaw|gsm),
       > priority = mine
    -- Executing [405@internacional:1] Dial("IAX2/401-60", "IAX2/411|20|TtwW") in new stack
    -- Called 405
    -- Call accepted by 192.168.5.223 (format alaw)
    -- Format for call is alaw
    -- IAX2/405-61 is ringing
    -- ast_get_srv: SRV lookup for '_sip._udp.vono.net.br' mapped to host sbc2.vono.net.br, port 5060
[Feb 25 18:12:20] NOTICE[18076]: chan_iax2.c:7714 socket_process: Rejected connect attempt from 192.168.5.254, request '*5@internacional' does not exist
[Feb 25 18:12:22] NOTICE[18074]: chan_iax2.c:7714 socket_process: Rejected connect attempt from 192.168.5.254, request '*8@internacional' does not exist
penelope*CLI> quit