My friend,
On MA5675 CLI you can use the commando "display ip interface brief" :
huawei#display ip interface brief
*down: administratively down
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 1
The number of interface that is DOWN in Physical is 1
The number of interface that is UP in Protocol is 1
The number of interface that is DOWN in Protocol is 1
Interface IP Address/Mask Physical Protocol VPN
MEth0 10.11.104.1/16 down down --
NULL0 unassigned up up(s) --
On interface WEB:
Check the ONT connection status.
In the navigation tree, choose Status > WAN Information. In the right pane, Connection Status is Connected.

On OLT:
huawei(config-if-gpon-0/3)#display ont ipconfig
{ portid<U><0,15> }:0
{ ontid<U><0,127> }:0
Command:
display ont ipconfig 0 0
---------------------------------------------
ONT IP host index : 1
ONT config type : DHCP
ONT IP : 10.144.152.40
i hope it helpful!