
 40 
INDEX 
R 
regulatory compliance........... 35–37 
repair...........................................34 
RMA............................................ 34 
RS232........................ see interface 
RS485........................ see interface 
S 
safety...........................................35 
SELV.............................see caution 
serial number.................................6 
specifications.........................29, 30 
stand................................. 2, 12–16 
T 
termination.............................31–33 
tones ...........................................18 
troubleshooting......................26–28 
U 
UL................................. see caution 
USB............................ see interface 
V 
ventilation....................................30 
voltage................ 2, 30, see caution 
W 
warranty...................................... 34 
white LED....................see indicator 
window.................................... 4, 16 
Y 
yellow LED................ see indicators