26
ISDN TA/V
5.3 The Front-Panel LCD and LEDs
LCD —
The Liquid Crystal Display is a two-line sixteen character display used
as a progress indicator and to report system messages.
POWER —
Should be lit whenever the ISDN TA/V is powered on, indicating
that it is capable of operating. During the power-on test sequence, and all
other tests, this indicator will flash every half second.
ISDN OK —
Is an indicator of the state of the ISDN line. This LED should be
lit whenever the ISDN TA/V is powered on while connected to a working
ISDN service.
SEND —
Flashes on and off to indicate that the ISDN TA/V is receiving data
from the terminal or computer attached to the DTE interface.
RECEIVE —
Flashes on and off to indicate that the unit is passing data
received over the ISDN to the DTE interface.
ANSWER —
Lights to indicate that the ISDN TA/V has been configured to
automatically answer an incoming data call. When an incoming data call is
detected, this indicator will flash.
TERMINAL 1 —
This is an indicator of a signal provided by the computer or
terminal attached to the ISDN TA/V’s DTE interface. It is normally used to
signal the ISDN TA/V that a call can be made, or an incoming call answered.
The ISDN TA/V may be configured to act in different ways on receipt of this
signal (according to the
AT&D
and
AT&M
commands). Refer to Part II of
this manual, the Reference section, for further details.
TERMINAL 2 —
Is not used on this version of the ISDN TA/V.
ON-LINE 1 —
Lights to indicate that the unit has seized either channel of the
ISDN line, and is forwarding data traffic on the ISDN line to the rear- panel
connector marked
DTE
.
ON-LINE 2 —
Is not used on this version of the ISDN TA/V.
