ADTRAN 1200410L2, User Manual

Page: 60 / 80

Chapter 7. Test Menu
60 ESU LT User Manual 61200410L2-1A
LOCAL LOOPBK
There are three choices available for setting the local loopback:
No Loopback
Deactivates the loopback.
Line On
Activates the line loopback.
Payload On
Activates the payload loopback. The payload loopback is not
supported in unframed mode.
REMOTE LOOPBK
No Loopback
Deactivates the loopback.
FE1 Loopback
FE1 loopback sends V.54 loopback code in all mapped TS0s toward
the network. The far end unit will respond by initiating a local line
loopback. This loopback is not available when operating in
unframed mode.
TEST PATTERN
Sets the pattern for the test and initiates the transmission of the
pattern. There are four patterns available. The test is terminated by
selecting
N
O
P
ATTERN
.
1:8 ALL TS0s
The 1:8 is a stress pattern which places the maximum number of 0s
in the transmitted data. This is always done over all time slots.
This pattern is used in conjunction with external test equipment to
determine whether the E1 line is performing acceptably under a
stress condition. Each channel of the E1 has only one bit set.
QRSS ACT TS0s
The ESU LT has an internal QRSS pattern generator and detector.
The pattern only appears in the TS0s assigned to the Nx56K/64K
port. The QRSS test pattern can be used in conjunction with
network loopbacks to perform end-to-end tests.