Verilink 2048 (34-00179) Product Manual - Manual (Page 22)

4-2 Terminal Operation 2048 PMU/NTU
Unit Address: Below the unit header (2048 PMU), the cur-
rent unit address is displayed along with any information
entered in the ‘Element ID’ field of the ‘Utilities’ screen.
Menu Title: The third line displays the general classifica-
tion of functions currently accessible by the user (such as
‘
Alarms ’ or ‘ Performance ’).
Messages: This line may display the following messages:
NET ALARM: An error condition has exceeded the speci-
fied alarm threshold on the network interface.
DTE ALARM: An error condition has exceeded the speci-
fied alarm threshold on the DTE interface.
NET LOOP: A payload or line loopback is active on the
network interface.
DTE LOOP: A payload or line loopback is active on the
DTE interface.
TEST ACTIVE: BERT has been activated by the Terminal
Interface or the EM8000 system. While this is being dis-
played, alarm detection and reporting is inhibited.
FAR END ALARM: The far end has an alarm condition
(detectable only with TxPORT proprietary devices).
FAR END LOOP: A payload or line loopback is active at
the far end device.
FAR END TEST ACTIVE: The far end device has a test
active (this is detectable only with TxPORT proprietary
devices).
4.1.3 Interface Start Up
Once a compatible terminal is properly connected to the
PMU, a Terminal Interface session is started by sending a
‘
BREAK ’ to the unit. If the PTT or USER port is used, the
unit then responds with the prompt “ Enter Unit
Address ”. To activate the first (or only) unit, simply press
<return>. To select a specific unit, enter the address number
of the desired unit and press <return>.
The “ Enter Unit Address ” prompt will time out after
10 seconds. If this happens, send another ‘ BREAK ’. To
select another unit, exit the current Terminal Interface, send
a ‘
BREAK ’, and repeat the process.
If an invalid address is entered, that address is echoed back
to the terminal. Send a ‘
BREAK ’ to start a new session.
The ‘Main Menu’ screen (Screen 4-2) is displayed if no
password has been specified in the ‘Utilities’ menu. Refer to
Section 4.7 on page 4 -10 for information on setting the
password. In the ‘Password’ screen (Screen 4 -1) the user
must enter the correct password to obtain access to any other
menu.
4.1.4 Daisy-Chain Menu Operation
Multiple units may be connected to a single terminal by
using the PTT or USER daisy-chain bus. This terminal can
access the firmware embedded interface software within any
unit without having to move the connecting cables. The ter-
minal must be connected to the first unit’s PTT interface in a
daisy chain fashion using a split cable (refer to Table 1-1 on
page 1-4 for ordering information).
Each unit must then be connected to the next unit’s PTT port
in a daisy chain fashion (as required for the EM8000 man-
ager). The last unit is then connected to the other end of the
split cable. Refer to Figure 4-1.
Figure 4-1 Daisy-Chain Arrangement
The firmware revision number of all units in the NMS daisy
chain must be as follows:
2000 CSU Revision 2.09 or later
2048 PMU Revision 2.29 or later
4.1.5 Cursor Controls
The Terminal Interface utilizes a highlighted cursor to make
selections from menus and to select fields within screens.
The cursor can be moved using the standard keyboard arrow
keys (left, right, up, and down). Once a field is highlighted,
it is manipulated as described in Section 4.1.6.
For keyboards which do not have these standard keys or
have only some of them, an alternate set of cursor control
commands is provided. Each of these is performed by press-
Unit #1 IN/OUT OUT PTT
IN /OUT OUT PTT
IN /OUT OUT PTT
Unit #2
Last Unit
Split
Cable