NEC Univerge sv8500 Manual page 2713

7.7.2 Remote Loop-Back Test
This test checks to see if the test signal sent out (using the control signal link) to the remote office can
be received as it has been sent out, verifying that the line is working properly (the transmission line be-
tween the DLI/DAI and the DRU/DAU).
When this test is performed, the remote office must be in remote loop-back status.
When this test is performed from the DLI/DAI, setting/cancelling of remote loop-back can be made
from the DLI/DAI to the DRU/DAU. This test can be controlled only at the DLI/DAI side.
• When remote loop-back test is performed from the DLI/DAI
Telephony Server
• When remote loop-back test is performed from the DRU/DAU
Telephony Server
DLI/DAI is Remote Loop Back status.
Remote Loop-Back Test
DLI/DAI
DLI/DAI
VOL.3-226
CHAPTER 2 TERMINAL-RELATED DEVICES
DRU/DAU
DRU/DAU is Remote Loop Back status.
DRU/DAU