61203060L1-1A
© 2003 ADTRAN, Inc.
53
Chapter 8
Circuit Testing
Before using the TSU LT to pass data, ADTRAN recommends running tests on the circuit. Testing consists
of sending a test pattern from end-to-end and checking for errors in the pattern. There are two types of tests
used to accomplish this:
1. Loop-up the far end and then send a test pattern.
2. Send a test pattern from both ends and check at both ends.
Far End Looped Back Test
TSU LTs should respond to a loop-up code sent over the T1 circuit. The remote unit will “loop” the
network interface providing a path for data from the local unit over the circuit and back again. Sending a
known test pattern over this loop and checking for errors verifies circuit connectivity. The following
example loops the remote unit and sends a 511 pattern through the data path. Use the 511 test pattern with
any T1 configuration (regardless of the channel configuration) because 511 is always sent in the occupied
channels. Complete the steps outlined below to loop-up the remote TSU LT and send a test pattern.
Running the Test
1. Use the
front panel up and down arrows to place the cursor on
4) T
EST
and
press
E
NTER
to select.
Result:
The first two
T
EST
submenu items display.
2. Using the up and down arrows
,
place the cursor on
N
ETWORK
T
ESTS
, and press
E
NTER
.
Result:
Beginning display of the submenu items. Each menu item can be selected with the up and
down arrows.
3. Use the front panel up and down arrow keys to place the cursor on
REM LB:
and press
E
NTER
.
4. Move to
V.54 I
NBAND
PLB
and press
E
NTER
.
5. Now, use the front panel down arrow key to select
3) T
EST
P
ATTERN
.
6. Press
E
NTER
again to activate the
T
EST
P
ATTERN
submenu, and select
511 ACT DS0
S
.
7. Press
E
NTER
to activate the selection.
Result:
The TSU LT always checks for 511 errors. The results of this check are shown under
submenu item 4.
Summary of Contents for TSU LT
Page 1: ...TSU LT USER MANUAL Part Number 1203060L1 61203060L1 1A April 2003...
Page 16: ...List of Figures TSU LT User Manual 16 2003 ADTRAN Inc 61203060L1 1A...
Page 18: ...List of Tables TSU LT User Manual 18 2003 ADTRAN Inc 61203060L1 1A...
Page 26: ...Chapter 2 Inspection and Installation TSU LT User Manual 26 2003 ADTRAN Inc 61203060L1 1A...
Page 34: ...Chapter 3 Operation TSU LT User Manual 34 2003 ADTRAN Inc 61203060L1 1A...
Page 38: ...Chapter 4 Status Menu TSU LT User Manual 38 2003 ADTRAN Inc 61203060L1 1A...
Page 58: ...Appendix B DTE Data Rate Chart TSU LT User Manual 58 2003 ADTRAN Inc 61203060L1 1A...
Page 62: ...Appendix C Pinouts TSU LT User Manual 62 2003 ADTRAN Inc 61203060L1 1A...
