Filter
Top Products
COMSPHERE DualFlow Data Service Units
4-20 December 1996 3615-A2-GB20-20
Displaying External Leads
The Display (Displ
) selection allows you to view the
external lead states. When Display is selected, the
External Leads status report appears showing the current
status of the general-purpose external leads on the
EIA-232-D/V.24 interface.
Changing External Leads
The
Change (
Chang
) selection allows you to change
the state of the two output leads (for example, to change a
lead to signal a console operator or to reset a remote
computer). Leads can be changed from the NMS.
After the leads are set, press the F2 key to save the
leads in the specified state.
Reporting External Lead Changes to NMS
Changing either the
output leads
or the
input leads
changes the DSU’
s health and status message.
If the DSU is polled by the NMS, the NMS reports a
change configuration notification (CCN) event. The NMS
operator can then issue a CCN Display
command to
determine what caused the event.
•
If the event was caused the state of the
external
leads
, select
Displ
(F1) to see the current states of
the leads.
• If a positive (+) voltage is detected in either one of
the
input leads
, an external leads alarm is also
reported.
Message Branch
The
Messages (
Msgs) branch of the top-level menu
allows the DBM to receive messages from the NMS. It
only appears when there is a message waiting. Both
control and tributary DSUs can receive messages.
T
o receive messages:
. Procedure
1.
Press the
F3
key (Msgs).
2.
Select
Read (F1).
3.
If the message is
less than
16 characters in length,
the entire message is displayed.
If the message is
gr
eater than
16 characters, press
the key to scroll additional lines of the
message onto the screen.
T
o clear (delete) messages:
. Procedure
1.
Press the
F3
key (Msgs).
2.
Select
Clear (F2).
The message is deleted, and
Msgs no longer
appears over the F3 key.