International Communications Group Sigma7, Руководство пользователя и инструкция по установке, Страница: 19 / 62

International Communications Group, Inc.
User’s Guide and Installation Manual
Sigma
7
Aviation Telephone Handset
Sigma
7
1
April 2006
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document
.
User’s Guide
SYSTEM OVERVIEW
The Sigma
7
telephone is an aeronautical Communications Center handset. The Sigma
7
retractor-reel
handset is similar to current aeronautical handsets in appearance and form factor but is much simpler and
more conventional in its use. Both the 2-wire and 4-wire handsets have uncomplicated menus and
functions that are easy to learn or understand. The 2-wire version requires no external power other than
a telephone circuit connection; the 4-wire Sigma
7
requires 28 VDC to power the printed circuit board.
The Sigma
7
can be recessed into a drink rail or bulkhead. ICG offers an optional data jack (RJ-11) option
located in the cradle. The data jack can be either paralleled with the telephone circuit or it can be
connected to a separate circuit so that both telephone and data calls can be active at any time.
The Sigma
7
has an internal magnetic stripe reader to support credit card calls and a special-function key
to provide enhanced features such as flash transfer and access to programming menus.
Figure 1. The standard Sigma
7
in white