Operating the DSU
6.Select Save (F2).
The DSU displays the address assigned along with a Command Complete message.
If an error was made in entering the address:
.Procedure
1.Press the 
key to return to the Configure screen.
2.
3.Select Save again.
Control Branch
The Control (Ctrl) branch allows you to enable or disable the DSU's transmitter, as well as the DBM's or port's, and to display or change the status of the general purpose external DTE leads. A DBM can be disabled if it is addressed from the Remote branch.
Transmitter Control
The Transmitter Control (TxCtl) selection allows you to enable or disable the DSU's, DBM's, or port's transmitter (DDS core).
When the DSU transmitter is disabled, the following is possible:
•When a DSU is disabled, it responds to tests. Aborting a test clears the test but the unit remains disabled.
•A DSU in test clears the test when a disable (or enable) command is received.
•If an enable command is executed to a control from the NMS or the local DCP, all disabled tributaries are enabled; all tributaries in test are restored to Data mode.
When the local DBM is disabled, the DBM does not originate or answer any calls until enabled.
LEDs
The LEDs selection is only available from the Local branch. This selection allows you to monitor the port at any given time. When selected, the port's lead activity is reflected in the DCP circuit designation status indicators (TXD, RXD, etc.) on the faceplate of the Model 3551 DSU, or on the DCP of the Model 3550 DSU.
External Leads
The External Leads (ExtL) selection allows you to display the state of four
When the configuration option Ext Leads (External Leads) is set to ExtLd, you can change the state of the two output leads from the DCP or a 6700 Series NMS. When CCN by EL (CCN by External Leads) is enabled, the control DSU reports changes in the four leads to the 6700 Series NMS as part of its health and status poll response.
Table
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
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.
December 1996 |
