Could Transfer fax with sip trunk

[mespio]

Hi, I have 2 Asterisk PBX, One of them works as faxserver and another works as Gateway to PSTN (With E1), Two server are connected with sip trunk. Could i send and recieve fax with fax server?
I think this is not good way to transfer fax via sip trunk! Is it true? what about IAX trunk? Is it not wat too?
Thanks.with regards.

[ictinnovations]

For faxing PSTN (based asterisk server) is always a better choice to go with !

However SIP (the other server) also not is bad if it met following.

1. Low latency / distance from termination / PSTN server
2. Using G711 codec for trunking with PSTN server