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GateWay Fax Systems, inc. Model 90si Secure Fax Gateway User's Guide
www.gwfs.com, 877-951-9800, info@gwfs.com help line: 877-951-9814 page 23
Full Duplex is the factory default setting and the recommended setting for most crypto devices including STE,
Omni, Sectera vIPer and Wireline Terminals, KIV-7, KG-84 as well as STU-IIB and STU-IIIA.
The 90si's Half-Duplex setting was specically designed for use with PTT (Push To Talk) radio devices such as
the Harris PRC-117, Motorola LST-5 and the Raytheon PSC-5 at 16Kbps using the Mil STD Broadcast w/o FEC
protocol. With (04) Half Duplex selected, the RTS (Request To Send) lead is used to generate the PTT signal and
only goes active when the 90si has data to send, returning to the inactive state otherwise. If you wish to use your
90si with such PTT radio systems, please contact us at 1-877-951-9800 or 804-796-1900.
38 Setting and Using the Default Transmit Protocol
There are two ways to tell the 90si what protocol you wish it to use when transmitting a secure fax. One way is
using the Default Protocol Settings described in this section and the other is using the One-Time Codes described
in the next section.
The Default Transmit Protocol is factory set to Async 9600 bps and is employed during a normal 90si transmis-
sion by taking the fax off-hook, dialing a "1" on the dial pad and pressing the Start or Send button. The off-hook
step may be omitted if you fax does not have a Hook, Manual Dial, Monitor or On Hook Dial button (or its' equiv-
alent). The default setting are indicated on the 90si Default Settings List, an example of which is shown below.
90si Default Settings List:
Conguration (select one)
->(01)<- Secure Only (factory default)
(02) 1-Line Dual-Mode
(03) 2-Line Dual-Mode
Mode (select one)
(04) Half Duplex
->(05)<- Full Duplex
Protocol (select one)
(06) Async 2400 Bd
(07) Async 4800 Bd
->(08)<- Async 9600 Bd
(09) Async 19200 Bd
(10) Mil STD Handshake w/o FEC
(11) Mil STD Handshake w/FEC
(12) Mil STD Broadcast w/o FEC
(13) Mil STD Broadcast w/FEC
Misc.: (select any)
->(16)<- STE Connected
(17) OMNI, Sectera, vIPer, other Connected
The list is broken into four sections: Conguration, Mode and Protocol and Misc. The arrows (-> <-) point to the
item that is currently selected. In the above list, the Conguration is set to Secure Only, the Mode is Full Duplex
and the default Protocol is Async 9600 Bd (baud or bits per second). In each section, only one item can be se-
lected at a time.
Entering the Default Settings mode is done by pressing and holding the Reset button on the side of the 90si for
ve (5) to six (6) seconds until both Green and Red lights extinguish. Releasing the Reset button at this point will
place the 90si into the Default Settings mode as evidenced by the Green light extinguished and the Red light il-
luminated. Changing the default protocol is then done using the attached fax machine's handset (or Hook button)
and dial pad by dialing the two-digit code(s) of the setting(s) you wish to change. The Secure Telephone / Crypto
should be idle (not in Secure Data Mode). After dialing the two-digit code(s), hang up the fax to exit the Default
Settings mode. The Green light will blink a number of times and then illuminate steadily. The 90si is now ready to
operate with your new Default Settings.