The 1-Line Dual-Mode configuration is for use when the connected Commercial Fax Machine is to be used Primarily as a Secure fax and as a Secondary Non-Secure fax. An operator must be present to receive a non-secure fax.

Operation:
All calls to Line 1 ring into the secure telephone. Non-secure fax calls are placed on the fax. Secure fax calls are placed on the Secure Telephone. To receive a non-secure fax, answer the STU and then depress the “*” key on the STU twice (**). The fax will then be received.

90si Setup:
Set your 90si to “1-Line Dual Mode”. Click here for instructions.