User manual

18 SCOOP E-Z - User Manual 55 000 026 – Ed. B
This document is the property of AETA and can not be duplicated without authorisation November 2001
6. SCOOP E-Z OPERATION: How it works.
6.1. Introduction
Incoming audio into the Scoop E-Z is digitized by a state-of-the-art A/D converter and
processed through the Scoop E-Z's codec. The data is then sent via the internal ISDN or
POTS synchronous modem to the telephone network ( ISDN or POTS ) to a remote
Scoop E-Z or another compatible ISDN Audio Codec. Operating with a very fast DSP,
the codec runs an algorithm modeling the digital audio signal, in order to reduce the
digitized audio data rate.
At the other end of the telephone network, the answering Scoop E-Z reconstructs the
original audio signal with very little loss or induced artefacts and at an extremely low
audio delay time.
6.2. User interface
The user interface consists of a lexan matrix keypad and a LCD display. The keypad has
two sections.
- The first section is a 4x3 matrix including the numbers from 0 to 9,“*”, “#”.
Some keys have many functions :
2, 3, 4, 5, 6, 7, 8, 9, 0: for accessing to letters display on the key, press the key
several times.
Note : Space character is available on the “1” key.
- The second section is the Extended Keypad functions under the display.
There are 3 function keys not labeled. The key function depends of the menu, the
function label appears over the key on the second line of the display
- The third section is the special Keypad functions.
“OK” key to validate a choice.
“Esc” key to escape from a menu.
“Green phone” key to make a call.
“Red phone” key to on hook a call.