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Grandstream Networks, Inc. HT-70X User Manual Page 7 of 35
Firmware Version 1.0.0.18 Last Updated: 03/2012
Table 3: Advanced Definitions of the HT70X LEDs Pattern
Patten
Number
Condition
LED
LED Behavior
LED-01
Device has normal power
Power
ON
LED-02
Power Error: Power is removed from the device or power
supply with improper voltage is plugged in
Power
OFF
LED-03
Line X is registered normally to the sip providers network
and is ready to make a call
Phone
ON
LED-04
Voice mail waiting for Line X
Phone
1sec ON / 3sec OFF
LED-05
Device has normal WAN connection and has obtained IP
address
Internet
ON
LED-06
Internet link error: Device is powered up and ready to
connect to the Internet but the WAN/INTERNET port is
down
Internet
OFF
LED-07
Internet DHCP Error: Device is properly connected but it is
unable to retrieve an IP address from the device it is
connected to
Internet
0.25sec ON/ 0.25sec OFF
LED-08
Line Registration failed: Device is properly setup, can
connect to provider's network, but cannot register to
provider's SIP proxy (no 200 OK)
Phone
OFF
LED-09
Device is connected (has physical data link) but there are
incorrect network settings typically associated with PPPoE
connection failure
Internet
0.25sec ON/ 0.25sec OFF
LED-10
Hazardous potential test failed: Hazardous AC or DC
voltage is present on the tip and ring or both signals of
phone line X
Phone
0.25sec ON/ 0.25sec OFF
LED-11
Foreign electro Motive Force (EMF) Test fail. Foreign
voltage is present on the tip, ring or both signals of phone
line. Device has detected additional external Phone
voltage on the FXS phone line.
Phone
0.25sec ON/ 0.25sec OFF
LED-12
Resistive fault test failed. Either tip or ring is shorted to
ground or they are shorted to each other.
Phone
0.25sec ON/ 0.25sec OFF
LED-13
Receiver off hook test fail. One or more phones are off
hook on phone line during test.
Phone
0.25sec ON/ 0.25sec OFF
LED-14
REN test failed – high REN detected. Too many parallel
phones connected to phone line X
Phone
0.25sec ON/ 0.25sec OFF
LED-15
Line is active
Phone
1 sec ON/ 1 sec OFF
LED-16
Line inactive
Phone
ON
LED-17
During Provisioning Stage*
Internet /
Phone
0.2sec ON/ 0.2sec OFF
LED-18
During Firmware Recovery Stage*
Internet /
Phone
0.4sec ON/ 0.4sec OFF
*Note: In Provisioning and Firmware Recovery Stage, the power LED is Steady ON.