functions and pathways. Compare it against the menus
that appear as you move through procedures. You will
learn to quickly access where you want to go on the menu
when operating the DSU. (This menu is also included on
the handy Reference Card that comes with this guide,
which can be removed and placed with your DSU.)

Menu Structure

The DSU’s operation is represented as menu selections

that branch downward from its starting point, the top-level
menu, like the roots of a tree. The menu is sometimes
referred to as a menu tree.

Top-Level Menu

The top-level menu is the starting point for all DSU

operations. You can always return to this point from
anywhere in the menu by pressing the

key. Pressing

this key immediately terminates any operation or work in
progress.

The following shows an example of the top-level menu

for a standalone Model 3615 DSU that is configured as a
control operating at 9.6 kbps, with an NMS message
waiting.

232 DBM 9.6 C
Local Remot Msg

The following information is displayed:

Line 1 – Source of the information being displayed

– DSU’s current function or mode (In this

example, the unit is operating as a DBM,
not as a DSU.)

– DSU’s data rate

– DSU’s network designation (Here the

DSU is a control.)

If this display was for a Model 3616 (a
carrier-mounted DSU), the carrier (nest or
rack) and slot numbers would appear
instead of port interface (e.g., Carrier 2
and

Slot 16 would appear as 2:16).

Line 2 – Menu selections, one appearing directly

over each function key (F1 and F2).

Continued on Page A-4.

This manual is related to the following products:

COMSPHERE 3616