Pub. 42004-547A
NEMA 4X VoIP Telephones
Page 14 of 17
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Troubleshooting
Table 6. Troubleshooting Chart
Problem
Possible Solution
Low volume in handset
or headset
Increase the volume setting using the Volume Adjust button on the front
panel.
High volume in handset
or headset
Decrease the volume setting using the Volume Adjust button on the front
panel.
Front panel push buttons
not operational
Verify the push buttons are properly configured.
Inputs not operational
•
Check the input connections.
•
Verify the inputs are properly configured.
Outputs not operational
•
Check the output connections.
•
Verify the outputs are properly configured.
Cannot make or receive
calls
•
Check the connection of the LAN cable.
•
Verify that power is applied to the unit.
•
Verify the LAN parameters have been configured properly.
•
Verify the telephone has been set up on the network.
No power indication
•
Check the power connections.
•
Check fuses. Replace fuses with identical type/ratings.
•
If using POE, check the operation of the POE equipment.
Status Indication
Power
The
ON
LED, located on the VoIP PCBA (see Figure 7), illuminates when power is applied to the
telephone.
Heartbeat
The
HB
LED, located on the VoIP PCBA (see Figure 7), flashes when communication over the LAN is
established.
Link
The
LNK
LED, located on the VoIP PCBA (see Figure 7), indicates an active network connection when
illuminated.
Speed
The
SP
LED, located on the VoIP PCBA (see Figure 7), indicates a 100 Mbps network connection when
illuminated or a 10 Mbps connection when off.
