NEC Univerge sv8500 Manual page 2819

Lamp Indications
NAME COLOR
LINK0 GREEN Digital Interface is established.
ALM0 RED DRE is abnormal
LB0 RED Loop back mode
Switch Settings
SWITCH SWITCH
NAME NO.
1
2
3
4
SW70
5
6
7
8
STATE
STANDARD
SETTING
SETTING
×
ON
ON
×
OFF
ON
×
OFF
×
ON
OFF
×
ON
OFF
×
ON
OFF
×
ON
OFF
×
ON
OFF
CHAPTER 2
Signalling link is established.
PCM, FRM, MFRM, RMT, BLUE, CRC
Fixed to ON
Designate CRC synchronization detection timer sequence
Not designate CRC synchronization detection timer sequence
Designate CRC4 check sequence
Not designate CRC4 check sequence
Time Slot Designation on transmission line
See the table below.
VOL.3-332
TERMINAL-RELATED DEVICES
REFERENCE
MEANING