Operating the DSU
Health and Status
The Health and Status (H/S) subbranch displays the health and status of the DSU, as well as the DBM. It automatically scans for DSU and line conditions that are not within normal limits.
There are three types of Health and Status messages:
•Devic (Device Health and Status)
•Expan (Expanded Health and Status)
•Subn (Subnetwork Health and Status)
All alarm and status conditions are displayed for the specified DSU at the time the option is selected. For a local DSU, the alarm and status conditions are updated every 2 seconds; for a remote DSU, the alarm and status conditions are not updated.
Refer to Appendix C for a complete listing of these messages.
Device Health and Status
Device Health and Status (Devic) reports health and status information for a selected DSU. If five minutes elapse without a key being pressed, the Device Health and Status screen is redisplayed.
•When the digital circuit is the active link,
ÐThe first line displays a running
ÐThe second line displays the DSU's operating rate and can also display one or more of the test or alarm messages.
•An asterisk ( * ) appears at the far right to indicate NMS activity.
•A right arrow (→ ) appears just before the asterisk
if there is more than one message. Press the 
key to see the next message.
Expanded Health and Status
Expanded Health and Status (Expan) only appears
during automatic dialing, and only if an expanded health and status message has been generated. It retrieves Health and Status information for the local DSU after an automatic backup or
If the right arrow (→ ) appears to the right of Expanded
H/S, there is more than one message. Press the 
key to see the next message.
Subnetwork Health and Status
Subnetwork Health and Status (Subn) displays status information from a DSU's subnetwork (all DSUs and DBMs assigned to that DSU's active poll list). The downstream network addresses and current statuses are listed. To page through tributary addresses:
•Press the F1 key ( ↑ ) for the next highest network address.
•Press the F2 key ( ↓) for the next lowest network address.
No PList appears if no DSUs are being monitored downstream.
This status information is only available through the local branch and only when DBM Diag Type is set to NonD.
DTE Status
The DTE status subbranch provides a snapshot status of the local or remote unit's external DTE interface.
•For the local DSU status, the display is sampled and updated every 2 seconds.
•For the remote DSU status, only one set of states is returned based upon a monitoring period of approximately 3 seconds.
The DTE interface statuses are displayed in sets. Use
the 
or 
key to scroll each set of lead statuses into view.
If both a backup connection and the DDS line are active a selection screen appears first.
•Select V.35 to monitor the V.35 interface (for user data).
•Select 232 to monitor the
December 1996 |
