The Two-Line Dual-Mode configuration is for installations where the connected Commercial Fax will function as the groups Primary Non-Secure Fax and as a Primary Secure Fax.

Operation:
Non-secure fax: As long as the Secure Telephone is not in “Secure Data” mode the Commercial Fax Machine is connected to Line 1 and functions as a non-secure fax.
Secure fax: Once the Secure Telephone is in “Secure Data” mode, the Commercial Fax Machine is disconnected from Line 1 and routed through the 90si and the Secure Telephone and then functions as a secure fax..

90si Setup:
Set your 90si to “2-Line Dual Mode”. Click here for instructions.