S-Series, U-Series & N-Series
This part applies for the S-Series, U-Series and N-Series.
- S-Series: S20, S50, S100, S300, S412
- U-Series: SOHO, Stanadard, U100, U200, U300, U5XX
- N-Series: N412, N824
Power components
Board components
- Boot Failure
- Network Interface Failure
- USB port / TF card slot / SD card slot Failure
- DSP Chip Failure
Modules
S2 Module Hardware Issues
O2 Module Hardware Issues
SO Module Hardware Issues
For FXS port, refer the S2 module; for FXO port, refer the O2 module.
B2 Module Hardware Issues
Cellular Module Hardware Issues
D30 Hardware Issues
Expansion Card
EX08 Hardware Issues
EX30 Hardware Issues
E1 Trunk
TA FXS Gateway
Power components
Board components
Port components
- TA FXS Port No Dial Tone
- TA FXS Port Always Off-Hook
- FXS Port Detection Failure
- Port Voice Quality Issue
TA FXO Gateway
Power components
Board components
Port components
TB ISDN Gateway
Power components
Board components
Port components
TE ISDN Gateway
Power components
Board components
Port components
TG ISDN Gateway
Power components
Board components
Port components
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