DCP Operation
3-5
3920-A2-GN31-30
November 1996
Table 3-1
(1 of 2)
392x
Plus DCP LEDs
Label
Color
Indicates
Pwr
green
Power has been applied to the modem.
Alrm
red
Flashing – A major alarm has been detected in a remote 392x
Plus modem.
ON – A major alarm has been detected in the local modem. (For Health and Status
alarm conditions, refer to Table 3-6 in the
Device Health and Status section of this
chapter.)
Diag
(3920Plus
only)
green
The modem is receiving diagnostic communications (either a command or a status poll).
Test/142
yellow
Flashing – The modem is involved in a firmware upgrade. Normal operation is not
possible.
ON – The modem is involved in a test. Normal operation is not possible.
OFF – The modem is not involved in a test or firmware upgrade.
Dial
yellow
Flashing – The modem is attempting to establish a call over the dial network, or the
modem is in Dial Standby mode.
ON – The modem has established a dial connection.
OFF – A dial connection does not exist.
RI/125
(3921Plus
only)
green
A ringing signal is being received.
Busy
(3921Plus
only)
yellow
The modem is placed in a forced busy condition and is off-hook.
Serv
(3921Plus
only)
yellow
The modem’s dial line is connected to the carrier service line rather than the normally
assigned dial network.
SQ
yellow
The receive telephone line signal is degraded or the modem’s data path has been
blocked (SQ flashes).
Rate
(3920Plus
only)
yellow
ON – The modem is connected at a data rate lower than the data rate it is configured for.
OFF – The modem is connected at its configured data rate.
Front Panel
(3921Plus
only)
yellow
The modem is connected to the carrier’s SDCP.
