COMSPHERE 3550 Series Data Service Units
F1 F2 F3
•The 
key returns you to the
•The 
key returns you to the previous display, one level up from the current display. It can also be used to terminate a data entry display without making a change.
•The 
and 
keys scroll menus or other displays to the left or right, respectively.
On status and test result displays, the 
and 
keys scroll additional information into view.
On data entry displays, these keys move the cursor one character to the left or right to allow entry of one digit or character at a time.
•Function keys (F1, F2, or F3) select the item displayed directly above the key.
Additional information on operating the DSU's keypad can be found in the procedures used to install and verify operation of the DSU in Chapters 2 and 3, the procedure for editing configuration options in Chapter 5, and the various procedures scattered throughout this chapter.
Status Branch
The Status (Stat) branch reports on the health and status of the DSU, DBM, TDM/Flex, the DTE interface, the quality of the dial connection, the identity of the DSU (model number, serial number, etc.), and the terminal's power (where it checks the presence of voltage on the DTE's RTS lead).
Health and Status
The Health and Status (H/S) subbranch displays the health and status of the DSU, as well as a DBM or TDM/Flex, if installed. 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.
Menu Structure
The menu is your map through the DSU's various functions. The following sections describe each branch and subbranch, and provide procedures for operating certain features. Appendix A shows the complete menu and describes the DSU's branches and subbranches. (The menu is also included on the handy Reference Card that comes with this guide.)
Top-Level Menu
The
anywhere in the menu by pressing the 
key. Pressing this key immediately terminates any operation or work in progress. Refer to Appendix A as you read about the branches and subbranches.
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.
December 1996 |
