User's Manual

Service Calling System User Manual----English Version
- 21 -
4.2.5 Key Function
Notes：The calling displays will power off automatically if there is no any operation
within 8 hours.
Selection key; move menu upwards.
Selection key; move menu downwards.
Enter function set mode.
Confirm the operation.
Long press this key to enter trouble test mode.
Cancel key: press this key to cancel/clear items.
On-Off key: press it and hold for 1 sec to power on/off it.
WD1X / PD1X