SIP-FAX problem

[MBMarkus]

Hi all,
I've been working on a problem for some time. We have fax machines from Ricoh that can establish a SIP connection to the PBX. I configure a SIP device user in the OXE. The FAX device registers successfully and I can fax to another SIP fax via SIP. The internal telephone number is enough. I can also fax to an analog G3 FAX with the internal phone number. Note, the G3 Modem on the SIP-Machine is not connected and it works! However, the SIP-FAX cannot receive faxes from a G3 FAX. Also no telephone calls. The connection breaks off after approx. 1 sec (please hang up).
Does anyone have any idea why?
Regards,
Markus

[MBMarkus]

Hi, Nobody has an idea?
Regards,
Markus

[vad]

Looks like you have some problem with codecs/services.
Maybe if you show sip trace (f.e. for telephone call) - someone can give you some advise.

Your PBX release (f.e. k1.50.44) interesting too.