The IP Phone does get the ip address, subnet form IPO500 and these message from monitor,
2019-12-20T15:46:46 4919536mS DHCP: DHCP type=DHCPMsgRequest HTYPE=01 ResIP=192.168.17.33
2019-12-20T15:46:46 4919536mS DHCP: DHCP::SetState, 192.168.17.33: Offering->Bound
2019-12-20T15:46:49 4922397mS DHCP: DHCP type=DHCPMsgDiscover HTYPE=01 H=C81FEAB56593 ReqIP=0.0.0.0 CI=Absent
2019-12-20T15:46:49 4922397mS DHCP: DHCP proxy is NOT possible
2019-12-20T15:46:49 4922398mS DHCP: DHCP type=DHCPMsgDiscover HTYPE=01 ResIP=192.168.17.32
2019-12-20T15:46:49 4922398mS DHCP: DHCP::SetState, 192.168.17.32: Bound->Offering
2019-12-20T15:46:50 4923908mS DHCP: DHCP type=DHCPMsgRequest HTYPE=01 H=C81FEAB56593 ReqIP=192.168.17.32 CI=Absent
2019-12-20T15:46:50 4923908mS DHCP: DHCP proxy is NOT possible
2019-12-20T15:46:50 4923908mS DHCP: DHCP type=DHCPMsgRequest HTYPE=01 ResIP=192.168.17.32
2019-12-20T15:46:50 4923908mS DHCP: DHCP::SetState, 192.168.17.32: Offering->Bound
2019-12-20T15:46:55 4928048mS DHCP: DHCP type=DHCPMsgDiscover HTYPE=01 H=C81FEAB567D0 ReqIP=0.0.0.0 CI=Absent
2019-12-20T15:46:55 4928048mS DHCP: DHCP proxy is NOT possible
2019-12-20T15:46:55 4928048mS DHCP: DHCP type=DHCPMsgDiscover HTYPE=01 ResIP=192.168.17.33
2019-12-20T15:46:55 4928049mS DHCP: DHCP::SetState, 192.168.17.33: Bound->Offering
2019-12-20T15:46:56 4929558mS DHCP: DHCP type=DHCPMsgRequest HTYPE=01 H=C81FEAB567D0 ReqIP=192.168.17.33 CI=Absent
2019-12-20T15:46:56 4929558mS DHCP: DHCP proxy is NOT possible
2019-12-20T15:46:56 4929558mS DHCP: DHCP type=DHCPMsgRequest HTYPE=01 ResIP=192.168.17.33
2019-12-20T15:46:56 4929558mS DHCP: DHCP::SetState, 192.168.17.33: Offering->Bound
2019-12-20T15:46:59 4932417mS DHCP: DHCP type=DHCPMsgDiscover HTYPE=01 H=C81FEAB56593 ReqIP=0.0.0.0 CI=Absent
2019-12-20T15:46:59 4932418mS DHCP: DHCP proxy is NOT possible
2019-12-20T15:46:59 4932418mS DHCP: DHCP type=DHCPMsgDiscover HTYPE=01 ResIP=192.168.17.32
2019-12-20T15:46:59 4932418mS DHCP: DHCP::SetState, 192.168.17.32: Bound->Offering
The Ip Phone did not reach to enter extension after the reboot.