Northern Telecom DMS-100 Series Installation And Maintenance Manual page 32

0 297-2121-226
0 VINTAGE 05.01
0 Power LED:
0 The Power LED provides an indication of power and synchronization
0 with the DLC (switched configuration) or another DU (non-switched
0 configuration).
0 synchronization with the DLC or
0 When power
0 with the DLC or another DU, the LED remains lit.
0 power to the DU, the LED is off.
0 Under test LED:
0 When the DU undergoes any diagnostic or loopback test, the Under
0 Test LED remains lit for the duration of the test.
0 DTR LED:
0 The DTR (data terminal ready) LED lights when the DTE is ready to
0 setup a data connection.
0 option is asserted.
0 3-15.
0 Connect LED:
0 The Connect LED flashes while a call is being
0 the data connection is established, the LED remains lit.
0 DN key and LED:
0 The DN key is used to originate and answer calls.
0 an incoming call, the DN LED flashes.
0 progress, the
0 LED is off.
0 Auto Dial key and LED:
0 The Auto Dial feature is used
0 directory number.
0 Auto Dial LED flashes when the DU is ready to store the directory
0 number during programming.
0 flashing; it is never continuously lit.
0 This feature is provided by the DMS-100 Family switch.
0 Ring Again key and LED:
0 The Ring Again feature is used to monitor a busy line.
0 Again key activates the feature.
0 and a busy
0 lit. When the line being monitored becomes free, the LED
0 es.
0 This feature is provided by the DMS-100 Family switch.
0 3-12
When power is supplied to the DU and there is no
is supplied to the DU and there is synchronization
The DTR LED remains lit
See Paragraph:
DN LED remains lit.
The Auto Dial key activates the feature.
The Auto Dial LED is
line is being monitored, the Ring Again LED remains
another DU, the
Assert DTR/Normal on page
connected.
While there is a
When the DU is idle, the DN
to automatically
While the feature
LED flashes.
If there is no
when the DTR
Once
When there is
call in
dial a stored
The
either off or
The Ring
is active,
flash-