Filter
Top Products
90si Reference Guide
GateWay Fax Systems, Inc., www.gwfs.com, 1-877-951-9800 page 3/13
1.0 Configuring your STU-III for the 90si
The most common cause of 90si operational problems are attributed to not having the STU-III's
Secure Data port configured for "Synchronous" operation. The following sections provide step-
by-step instructions for configuring various secure telephones for "Synchronous" operation as
well as setting "speed" and "duplex" to provide optimum performance with the 90si. The "Press"
column indicates which button on the secure telephone should be pressed. The "Display" column
indicates what the responding display will show. The first line indicates the state of the secure
telephone before proceeding.
1.1 AT&T Security Plus
Objective: To set Secure Data Mode for 4.8 Kbps, Full Duplex, Synchronous.
While On or Off-Hook:
Press
Display
Program
Program Mode
3, 6, #
Operation Complete (Sets Synchronous)
3, 4, #
Operation Complete (Sets 4.8 Kbps, Full Duplex)
3, 0, #
SD:48 FDX SYNC (Displays new configuration)
Program
(Standby display)