buy fax (www.vision-fax.com) 1, if you need to seal the document, the signature how to do? coFax fax server provides a complete set of signed and sealed by an electronic system that can advance the signature and seal will need to be scanned into electronic signatures supporting the fax software, send a fax, select the "Preview \ seal" on it the operation is very simple. 2, send a fax when the fax can not use IP? No problem! Need to dial the IP can be numbers, passwords and other pre-configured, will automatically dial the fax IP, you can set the sending time offer. 3, how to send a few dozen units in the same fax? (How to mass?) You simply add a fax sent from the communication book or want to send the recipient selected, click "Finish" button, coFax intelligent fax server will automatically dial-up line to send them one by one.