Adding an ONT on Huawei SmartAX MA5683T

Written by Madan Kc

Last updated: September 2026

Applies to: Huawei SmartAX MA5683T (also relevant to MA5600T, MA5608T, and MA5800 series with the same command set). Assumes the OLT is already configured and other ONTs are already online.

TL;DR: Find the new ONT’s serial number with display ont autofind all, register it with ont add, set its native VLAN, then create a matching service-port and save — the ONT won’t have internet until the service-port step is done.

Values in red are examples — replace the board/port numbers, serial number, VLAN, and service-port ID with your own.

Step 1 – Enter Configuration Mode

Connect via Telnet or console, log in, then run:

enable
config

Step 2 – Review the Current Configuration

Check which ONT numbers and service ports are already in use, so the new ONT doesn’t collide with an existing entry:

display current-configuration

Step 3 – Find the New ONT’s Serial Number

See which port and board the unregistered ONT is on, and copy its serial number:

display ont autofind all

💡 In PuTTY, select the serial number text and copy it with Ctrl+Ins instead of Ctrl+C, which doesn’t work in most terminal sessions.

Step 4 – Enter the GPON Board’s Interface

Go into the settings menu of the GPON board the ONT is connected to:

interface gpon 0/4

Step 5 – Add the ONT

ont add 0 5 sn-auth 48575443346C7B32 omci ont-lineprofile-id 10 ont-srvprofile-id 10 desc madankc

Replace desc madankc with your own customer name or address for easy identification later.

Step 6 – Set the Native VLAN on the ONT’s Ethernet Port

ont port native-vlan 0 5 eth 1 vlan 228

Step 7 – Exit the GPON Interface

The ONT is registered, but it won’t have internet yet — it still needs a service-port. Exit the GPON menu first:

quit

Step 8 – Add a Service Port for the New ONT

service-port 287 vlan 228 gpon 0/4/0 ont 5 gemport 1 multi-service user-vlan 228

Step 9 – Save the Configuration

save

Done — the ONT should now be online with working internet.

Step 10 – Check the ONT’s Optical Power

Go back into the GPON board’s interface and check the ONT’s Rx/Tx optical readings:

interface gpon 0/4
display ont optical-info 0 5

Command Reference

Command	Purpose
`display current-configuration`	Review existing ONT and service-port numbers
`display ont autofind all`	Find unregistered ONTs and their serial numbers
`ont add <port> <ont-id> sn-auth <sn> omci ont-lineprofile-id <id> ont-srvprofile-id <id> desc <text>`	Register the ONT
`ont port native-vlan <port> <ont-id> eth <n> vlan <id>`	Set the untagged VLAN on the ONT’s Ethernet port
`service-port <id> vlan <id> gpon <frame/slot/port> ont <id> gemport <n> multi-service user-vlan <id>`	Bring the ONT’s traffic online
`display ont optical-info <port> <ont-id>`	Check Rx/Tx optical power

FAQ

Why doesn’t the ONT have internet right after I add it?
Registering the ONT and setting its native VLAN only brings it onto the OLT — it still needs a service-port mapping its VLAN to a GEM port before traffic actually passes.

Why does Ctrl+C not work to copy the serial number in PuTTY?
PuTTY treats Ctrl+C as a terminal interrupt signal. Use Ctrl+Ins (or just select the text, which auto-copies in most PuTTY configurations) instead.

Do ont-lineprofile-id and ont-srvprofile-id need to already exist?
Yes. The ont add command references existing profiles by ID — if they haven’t been created yet, the command will fail.

What’s a healthy optical Rx power reading?
Typically between -8dBm and -27dBm. Readings weaker than around -28dBm often correlate with signal issues or frequent disconnections and are worth investigating further.

Also Read

Delete ONT from Huawei OLT How to Add an ONT with a New VLAN on Huawei MA5683T How to Add VLANs to an Active ONT on Huawei MA5683T Huawei 5680 OLT Native VLAN Configuration Method

Looking for the general version that works on every Huawei model? See the main guide: Adding ONT on Huawei OLT: Step-by-Step (All Models).