Cisco VoIP: Troubleshooting IP Phone Registration

1) Check DHCP configuration (option 150)
2) Check flash for firmware
3) Check tftp server command for files required

4)  Commands:
          debug ephone register

          debug ip dhcp server events

          debug ip dhcp

          show ephone-dn summary

          debug ephone keepalive

          debug ephone state
5) Ping ip address of the phone

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