Front Panel Operation
3-7
3610-A2-GB46-60
December 1996
Expanded Health and Status
Expanded Health and Status (Expan) appears during
an automatic backup for the local DSU when there is:
•
A dialing attempt failure.
•
An unrequested disconnect after a successful
connection.
Subnetwork Health and Status
Subnetwork Health and Status (Subn) displays status
information from a DSU’s subnetwork of all DSUs and
DBMs assigned to that DSU’s active poll list. The
downstream network addresses and their current status are
listed.
To page through the tributary addresses from the front
panel, press the:
•
F1 key for the next highest network address.
•
F2 key for the next lowest address.
Refer to Table E-6 for Subnetwork health and status
messages and recommended action.
DTE Status
DTE status is a snapshot display showing the status of
the external DTE interface of the local or remote
DSU/DBM. If more than one port is active, a port number
selection screen appears.
•
The local DSU status display is updated every
2 seconds.
•
The remote DSU status is updated approximately
every 3 seconds.
From the front panel, the DTE interface statuses appear
in sets. Use the
or
key to view each DTE lead
status.
Circuit Quality
Circuit Quality (CircQ) is a display showing the DDS
Receive Signal Loss (DDS RxLoss) based on peak
detection of the received signal. The DDS RxLoss display
is available when App Module ID displays XLOOP,
except when MUX Function is set to EBrdg.
The approximate DDS RxLoss appears when the
decibel range is between 0 (zero) and 65 and displays >65
for a loss greater than 65 dB. The following display
reflects a DDS Receive Signal Loss of 38 decibels.
F1
Circuit Quality:
DDS RxLoss:
38dB
F2
F3
Circuit quality also displays the level and quality of the
signal being received from the network when a V.32
analog DBM is active. When an analog DBM is not
active, the first four measurements display an x.
Identity
Identity (ID) displays the DSU’s model number, serial
number, software/firmware version, network address,
DSU rate and installed options.
Table 3-2 lists the Identity information provided for the
DSU and its options. One field appears at a time. Press the
key to display the next field.
When the control DSU firmware version is less than
7.24 but greater than 1.10, the tributary SW Version
changes need to be made as shown in Table G-1.
Terminal Power
Terminal Power (TPwr) displays the status of the
connected DTE’s EIA-232 and V.35 interface. The DSU
checks the state of the RTS lead and reports the DTE
power status.
For both the EIA-232 and V.35 interfaces, the second
line displays:
•
On if the voltage is less than –3V or greater than
+3V.
•
Off if no power is detected on the RTS lead.
