| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a facsimile device that enables IP facsimile transmission even while a PSTN line 1 facsimile is in use. <P>SOLUTION: A facsimile device performing T.38 IP facsimile communication by using an SIP as a communication call control protocol, has a plurality of PSTN facsimile lines. In the case that the IP facsimile transmission using T.38 is failed, the facsimile device automatically determines whether or not a PSTN line 2 option board is mounted, and if the option board is mounted, fallback to the PSTN line 2 is performed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
