1. DT700 Supports CDP
2. Cisco switch does not support LLDP
3. We disabled LLDP and enabled CDP
4. Instead of DHCP option, we used auto config tool to push configuration.
5. Its working on all phones, sometimes, any phone stop communicating.
6. Yesterday, one phone was working, I plugh PC port and disconnect phone port, and re-connnect, since that time, it stopped communicating.
7. I debugged, DHCP, phone is not send any DHCP request,
8. I can see NEC phone in show CDP neighbor as well.
9. Sometime it start working sudden
