🛠️ Prerequisites:
Access to BDCOM OLT via console or SSH
A configured uplink port to internet
ATU-Z compatible EPON ONU connected to OLT
Serial Number or MAC of ONU (can be found on ONU body)
✅ Step 1: Access the OLT
login: admin
password: admin
✅ Step 2: Enter Enable Mode
enable
✅ Step 3: Enter Configuration Mode
config
✅ Step 4: View Detected ONUs
show epon onu uncfg
🔍 This will show the list of unconfigured ONUs connected. You’ll find the ONU’s SN (Serial Number), like:
EPON0/1: ONU SN: ATUZ12345678
✅ Step 5: Add ONU to the OLT
interface epon 0/1
onu add 1 sn ATUZ12345678
📌 EPON0/1 = PON port, 1 = ONU ID, ATUZ12345678 = Serial number
✅ Step 6: Configure the Service-Port
This maps the ONU to a VLAN for internet access.
service-port 1 vlan 100 epon 0/1 onu 1 multi-service user-vlan 100
💡 VLAN 100 is an example, use your ISP-assigned VLAN
✅ Step 7: Assign a PPPoE or IP Address (Bridge or Router Mode)
For Bridge Mode (PPPoE):
interface epon 0/1
onu 1
bridge vlan 100
For Static IP or DHCP (Router Mode):
Configure on ONU web interface (192.168.1.1) after physical link is up.
✅ Step 8: Set Line Profile (if required)
epon profile line line1
dba-profile fix 1024
Then apply to ONU:
interface epon 0/1
onu 1
line-profile line1
✅ Step 9: Set Remote Management (Optional)
interface epon 0/1
onu 1
remote-ip 192.168.1.2
✅ Step 10: Save Configuration
write
✅ Step 11: Verify ONU is Active
show epon onu state
You should see:
EPON0/1: ONU 1 – ONLINE
🔎 Troubleshooting Tips:
Issue Solution
ONU not detected Check fiber connectivity, clean connectors
SN not recognized Verify from sticker or use show epon onu uncfg
No internet access Check VLAN config and service-port mapping
No PPPoE dial Ensure ONU in bridge mode and dialer on router
🧠 Extra Tips for ATU-Z ONU:
Most ATU-Z ONUs have web login at 192.168.1.1, user/pass: admin/admin
You can limit speed via traffic-profile on OLT
Use show run to verify config after saving
🏁 Final Words:
By following these steps, you can seamlessly configure an ATU-Z ONU on a BDCOM OLT. This method is tested in real-world scenarios in Mawna, Gazipur, and ensures smooth internet deployment for ISPs and end-users alike.
