Paradyne COMSPHERE 3615 - Manual (Page 53)

Operating the DSU
4-9 3615-A2-GB20-20 December 1996
Manual Backup
You can control each step of a backup attempt by
following one of these procedures.
Placing a Backup Call
To place a backup call:
.
Procedure
1. Go to the Bkup option set under the Confg branch
and set Auto Bckup to Disab.
2. Select Bckup (Backup branch) to select a
telephone number from the Backup Directory.
3. Select Dial, the Backup Dir screen is displayed
identifying the Backup Directory indicator.
If the telephone number in the Backup Directory is
the number you want to dial, go to Step 5.
4. Select another telephone number to call:
•
Press the F1 key (
↑
) to increment the directory
indicator (e.g., 1 to 2).
•
Press the F2 key (
↓
) to decrement the indicator
(e.g., 2 to 1).
5. Select Dial (F2); the DBM places the call.
6. Once the dialed call has been established, select
!Cnnct to switch data to the dialed connection.
Manual Dial Backup Termination
•
If in Standby mode, select Disc.
•
If in Dial Backup mode, select DrBU.
Test Branch
The Test branch provides extensive testing capabilities
for the DSU, the DDS circuit, the DBM, and the backup
circuit. Most tests can be run simultaneously on the DSU
and DBM. When the tributary DSU receives a test request
from the control DSU, it aborts any locally initiated test in
progress.
Running a test can affect your application data or may
cause your application session to be dropped depending
upon front-end processor, time-out parameters, etc. since
no data or acknowledgment messages will be transmitted
while the test is in progress.
Abort
The Abort selection allows you to abort a test that is
running. The DSU cannot run any other test until the test
in progress is aborted.
There are two types of selections to abort a test:
•
Selective terminates whatever test is in progress at
the local DSU.
•
Subn (Subnetwork) only displays for the DBM
branch. This selection terminates all tests running
on the remote DSU or DBM.
After selecting either Selective or Subn, the test is
terminated and the DCP displays the message Command
Complete.
Device Test
The Device (Devic) Test uses a test pattern generator
built into the DSU. When testing the DBM, the DBM must
be in Idle mode, with no call in progress before running a
Device Test.
NOTE
On power-up, the DSU sends
out polls to verify that a DBM is
installed. It then initiates a
Device Test on itself and the
DBM. The results of the tests
appear momentarily on the
DCP’s LCD.
Loopback
The Loopback (Lpbk) branch displays four loopbacks:
•
Local Loopback (LL) – DSU only
•
DTE Loopback (DTE)
•
Digital Loopback (DL)
•
Remote Digital Loopback (RL) – DBM only
Figure 4-3 shows where each loopback occurs on the
circuit. Refer to the figure as you read about loopbacks.