GateWay Fax Systems 90SI User Manual

GateWay Fax Systems, inc. 

Model 90si Secure Fax Gateway

 

User's Guide

 

 

 

page 29

  SIP is an acronym for Session Initiated Proto-

col and refers to a widely used commercial pro-

tocol for multimedia sessions over IP networks.

  New secure telephone for use by the US Gov-

ernment.

  Secure Telephone Unit Generation Two Version 

B. NATO version of STU-III.

  Secure Telephone Unit Generation Three. no 

longer in production and set to become obso-

lete at the end of 2009, the STU-III was the US 

Government's primary secure communications 

device for over twenty years.

  Secure Telephone Unit Generation Three Ver-

sion A. US Secure telephone that can connect 

with a STU-IIB.

  Synchronous refers to the way in which data 

is passed between the 90si and the attached 

Secure Telephone. Specifically, in synchronous 

communications each data bit is "clocked" 

between the 90si and the Secure Phone using 

clock signals generated by the Secure Phone. 

The clock signal tells the 90si what "data rate" 

the Secure Phone is using.

  This 90si configuration allows the attached fax 

to function as BOTH a secure fax AND a non-

secure fax. Unclassified faxes can be received 

aoutomatically (unattended).

  An acronym for Voice Over Internet Protocol 

which refers to systems for delivering voice 

communications over IP networks.

  Employed in the 90si, this type of memory 

loses its data when power is removed.