[asterisk-ss7] Outbound DTMF not working with LIBSS7

[Andreas Kaufmann]

Hi all,

DTMF is received by * via SIP/RFC2833 and is passed to LIBSS7. However, 
DTMF is not recognized at the other end. DTMF works fine on the same 
link when using chan_ss7.

Are there any configuration options for the DTMF signaling in LIBSS7?

Setup:

- asterisk-1.6.0.1
- dahdi-linux-2.0.0
- libss7-1.0.2
- Digium TE220P 2xE1


/etc/dahdi/system.conf:
-----------------------
span=1,1,0,ccs,hdb3,crc4
span=2,2,0,ccs,hdb3,crc4
mtp2=1
bchan=2-31
bchan=32-62

loadzone=us
defaultzone=us
------------------------


chan_dahdi.conf:
------------------------
[trunkgroups]

[channels]

context = ss7-incoming  ; dialplan context for incoming calls
signalling = ss7        ; signalling type
ss7type = itu           ; itu or ansi if you are using an ANSI link
linkset = 1             ; pick a number for your linkset identifier
pointcode = xxxx        ; The decimal form of your point code.
adjpointcode = yyyy     ; The point code of the switch adjacent to your
linkset
defaultdpc = yyyy       ; The point code of the switch you want to send
your ISUP
                          ; traffic to.
; SS7 group definition
group = 1               ; for use in dial(dahdi/g1/...)
networkindicator = national_spare
; channel definition
sigchan = 1
cicbeginswith = 2
channel = 2-31
cicbeginswith = 33      ; thanks Krzysztof :-)
channel = 32-62
---------------------------

Regards,
Andreas