Data Interface Board - PictureTel Concorde 4500 Servicing Manual

UNDERSTANDING THE ELECTRONICS MODULE
Feature
Extension
telephone
Extension ringer
Data Interface
Board
2-18
Table 2-5: Telephone Interface Board (Continued)
Function
Disconnecting a call
NotiÞes you of an
incoming video call
The Data Interface (DI) board, which is located in slot 5, is
conÞgured with four data interface ports. These ports enable the
system to communicate with external devices, such as a modem or
a personal computer. The connections for the ports are located on
the back edge of the board.
The Data Interface board performs the following functions:
Receives data from data terminal equipment (DTE) devices that
are connected to any of the four ports and passes the data to the
CP board for transmission on the network.
Uses modem control lines or the Xon/Xoff codes to start and
stop data ßow when ßow control is enabled.
Passes data received from the network to the DTE devices that
are connected to any of the four ports on the board.
Description
Using a wired keypad Ð If a call
gets disconnected when the
button is pressed, the
Audio Call
call is transferred to the
extension telephone (as long as
it is off the hook.) The light
next to the
Audio Call
on while the audio call is in
progress.
Using a wireless keypad ÐYou
can disconnect a call by
pressing the
Hang Up
you have both audio and video
calls open, select the call you
want to disconnect by pressing
the up or down
CHOOSE
arrow. Press
Hang Up
Rings when a call comes in.
button is
button. If
.