{{TAG>Troubleshooting}}
**Troubleshooting** category holding page.

  * [[sip_alg]]
  * [[sip_traces]]
  * [[handset_troubleshooting]] (inc Cisco SPA300/SPA500, Yealink T2/T4, Snom 300/700/800)
  * [[handset_firmware_upgrade]] (inc Cisco SPA300/SPA500 Series, Yealink T2/T4 Series [[:yealink_firmware_upgrade_guide#upgrading_the_firmware|T2x]]/T4x, Snom 300/700/800 Series)
  * [[handset_sip_trace]] (inc Cisco SPA300/SPA500, Yealink [[:yealink_firmware_upgrade_guide#trace_a_call|T2]]/T4, Snom 300/700/800 Series)