ADTRAN 1200275L1, User Manual

Page: 47 / 198

Chapter 3. Operation
61200275L1-1 TSU IQ+ User Manual 3-3
Shift Key
Enter alpha characters by first pressing and releasing the
Shift
key
and then pressing the desired character. The
Next
,
Prev
,
Add
, and
Delete
keys are also activated by first pressing
Shift
.
To activate a menu item designated by an alpha character rather
than a number, place the cursor on the menu item using the up and
down arrows or press
Shift
and then the letter. The flashing cursor
indicates the active parameter. Press
Enter
to select the item.
LED Descriptions
The TSU IQ+ has seven LED indicators:
RS
,
CS
,
TD
,
RD
, ERR ,
ALM
,
and
TST
. These LEDs are identified as follows:
RS: Request to Send
Reflects the status of the RS pin of the DTE interface.
CS: Clear to Send
Reflects the status of the CS pin of the DTE interface.
TD: Transmit Data
This LED is active when the TSU IQ+ DTE port is transmitting data.
RD: Receive Data
This LED is active when the TSU IQ+ DTE port is receiving data.
ERR: Error
This LED is active when a T1 line code violation or a T1 path code
violation occurs.
ALM: Alarm
This LED is active when an alarm condition exists. Alarm
conditions include:
T1 Alarm Conditions
• Loss of signal
• Loss of T1 frame sync (red alarm)
• Receiving AIS (alarm indication signal) from the service
provider
Frame Relay Alarm Condition
• Network frame relay signaling state is down