BDCOM OLT Default Password & Login Guide (2026)

Quick Answer: The BDCOM OLT default username is admin and the default password is admin. The default management IP address is 192.168.1.1. Open http://192.168.1.1 in a browser while connected to the OLT management port to access the web login page.

BDCOM OLTs are widely used by ISPs across Nepal, South Asia, Africa, and Southeast Asia. They are reliable GPON/EPON fiber optic line terminals — but when you first set one up or take over an existing installation, getting in can be confusing. This guide covers every access method so you are never locked out.

What Is a BDCOM OLT?

An OLT (Optical Line Terminal) is the central device in a GPON or EPON fiber optic network. It sits at the ISP’s office or data center and connects to hundreds of subscriber ONUs (Optical Network Units) through fiber cables. Think of the OLT as the “brain” of a fiber internet network.

BDCOM (BeiJing DataCom Communications Equipment Co.) is a Chinese networking manufacturer. Their OLT models — especially the P3310C — are among the most commonly deployed GPON OLTs by ISPs in Nepal, Bangladesh, India, Sri Lanka, and across Africa.

4 Ways to Access a BDCOM OLT

Method 1: Login via Web Browser

The easiest method. Works for most day-to-day configuration tasks.

Step 1: Connect Your PC to the OLT Management Port

• Locate the MGMT (Management) Ethernet port on the BDCOM OLT front or rear panel.
• Plug a standard RJ45 LAN cable from your PC/laptop into this MGMT port.
• Do not use the GPON uplink ports or SFP uplink ports — those are for fiber/WAN connectivity, not management.

[Screenshot: BDCOM P3310C front panel — MGMT port highlighted with red box, separate from GPON ports]
Alt text: BDCOM P3310C OLT front panel with management port labeled and highlighted

Step 2: Set Your PC IP Address Manually

The BDCOM OLT management IP is 192.168.1.1. Your PC must be on the same subnet to reach it.

On Windows 10/11:

1. Open Control Panel → Network and Sharing Center → Change adapter settings.
2. Right-click your Ethernet adapter → Properties.
3. Select Internet Protocol Version 4 (TCP/IPv4) → Properties.
4. Select Use the following IP address and enter:
   • IP address: 192.168.1.2
   • Subnet mask: 255.255.255.0
   • Default gateway: 192.168.1.1
5. Click OK twice.

Quick way on Windows (Command Prompt as Administrator):

netsh interface ip set address "Ethernet" static 192.168.1.2 255.255.255.0 192.168.1.1

On Linux:

sudo ip addr add 192.168.1.2/24 dev eth0
sudo ip route add default via 192.168.1.1

[Screenshot: Windows TCP/IPv4 Properties — 192.168.1.2 set as IP, 192.168.1.1 as gateway]
Alt text: Windows TCP IPv4 settings showing 192.168.1.2 IP address for BDCOM OLT access

Step 3: Open the BDCOM OLT Web Interface

1. Open any web browser — Chrome, Firefox, or Edge.
2. Type in the address bar: http://192.168.1.1
3. Press Enter.
4. The BDCOM OLT login page appears.

[Screenshot: BDCOM OLT web login page — username and password fields, Login button]
Alt text: BDCOM OLT web interface login page at 192.168.1.1 with admin credentials

Step 4: Enter Default Login Credentials

1. Username: admin
2. Password: admin (or try bdcom if admin fails)
3. Click Login or press Enter.

Step 5: BDCOM OLT Dashboard — You Are In

After successful login, the BDCOM OLT web dashboard loads. You will see navigation menus for:

• System — basic device info, time, management IP
• GPON / EPON — ONU management, port configuration
• Interface — Ethernet uplink configuration
• VLAN — VLAN setup for subscriber traffic isolation
• QoS — bandwidth management per ONU
• Security — user management, access control

[Screenshot: BDCOM OLT web dashboard after successful login — system info visible]
Alt text: BDCOM OLT web management dashboard showing system status and navigation menu

Method 2: Login via Telnet (CLI)

Telnet gives you a command-line interface directly into the BDCOM OLT. Most experienced ISP technicians prefer CLI for speed and full control.

Using PuTTY on Windows

1. Download and open PuTTY (free).
2. Set:
   • Host Name: 192.168.1.1
   • Port: 23
   • Connection type: Telnet
3. Click Open.
4. A terminal window opens. At the login prompts:

Username: admin
Password: admin

Using Terminal on Linux / Mac

telnet 192.168.1.1

Enter Enable (Privileged) Mode

After login, you are in User EXEC mode (limited commands). To configure the OLT, you must enter Privileged EXEC mode:

BDCOM> enable
Password: admin
BDCOM#

The # prompt confirms you are now in privileged mode. You have full access to all configuration commands.

Essential First Commands After Telnet Login

# Check device hardware and firmware version
BDCOM# show version

# Show all IP interfaces and management IP
BDCOM# show ip interface brief

# Show all registered ONUs
BDCOM# show gpon onu state

# Show all GPON port status
BDCOM# show interface gpon-olt 1/1

# Save configuration
BDCOM# write memory

[Screenshot: PuTTY terminal showing BDCOM OLT Telnet session — BDCOM# prompt after enable]
Alt text: PuTTY Telnet session connected to BDCOM OLT showing privileged mode prompt

Method 3: Login via SSH (Secure & Recommended for Remote Access)

SSH is the secure version of Telnet. All traffic is encrypted. Use SSH whenever possible — especially if you manage the OLT remotely over the internet.

SSH via PuTTY (Windows)

1. Open PuTTY.
2. Set:
   • Host Name: 192.168.1.1
   • Port: 22
   • Connection type: SSH
3. Click Open. Accept the SSH key fingerprint on first connection.
4. Enter username admin and password admin.

SSH via Terminal (Linux / Mac / Windows PowerShell)

ssh admin@192.168.1.1

BDCOM# configure terminal
BDCOM(config)# ip ssh version 2
BDCOM(config)# crypto key generate rsa modulus 1024
BDCOM(config)# line vty 0 4
BDCOM(config-line)# transport input ssh
BDCOM(config-line)# end
BDCOM# write memory

Method 4: Login via Console Cable (Out-of-Band Access)

The console port is your last resort. It works even when the network is completely misconfigured or the management IP is unknown. This is the method you use for password recovery and factory resets.

What You Need

• A console cable — RJ45 to DB9 (RS-232) or RJ45 to USB (with CH340 USB-serial driver)
• Terminal software: PuTTY (Windows) or screen / minicom (Linux/Mac)

Console Cable Settings

Connect via PuTTY Console (Windows)

1. Plug console cable into BDCOM OLT console port (labeled CONSOLE or CON).
2. Plug the USB or DB9 end into your PC.
3. Open Device Manager → Ports (COM & LPT) — note the COM port number (e.g., COM3).
4. Open PuTTY → Select Serial.
5. Set Serial line to COM3 (your COM port), Speed to 9600.
6. Click Open.
7. Press Enter once — the login prompt appears.

Connect via Terminal on Linux/Mac

# Find the console device
ls /dev/ttyUSB* /dev/ttyS*

# Connect (replace ttyUSB0 with your device)
screen /dev/ttyUSB0 9600
# or
minicom -b 9600 -D /dev/ttyUSB0

[Screenshot: PuTTY Serial connection settings — COM3, 9600 baud, connection type Serial]
Alt text: PuTTY serial console settings for BDCOM OLT connection at 9600 baud

How to Reset BDCOM OLT Password (Forgot Password)

If the default password was changed and nobody recorded the new one, you have two options: recover via console (preferred — keeps your config) or factory reset (erases everything).

Option A: Change Password via CLI (If You Can Still Login)

If you have any access (Telnet, SSH, or console), change the admin password like this:

BDCOM# configure terminal

! Change admin login password
BDCOM(config)# username admin privilege 15 password 0 YourNewPassword

! Change enable/privileged mode password
BDCOM(config)# enable password 0 YourEnablePassword

! Save the change
BDCOM(config)# end
BDCOM# write memory

Option B: Factory Reset via Console (Erases All Config)

1. Connect via console cable (see Method 4 above).
2. Power-cycle the OLT and watch the boot output.
3. During boot, some BDCOM models have a boot menu — press a key when prompted to interrupt boot and access recovery mode.
4. If no boot menu, wait for full boot, login with any working credentials.
5. In privileged mode, run:

BDCOM# write erase
Erasing the nvram filesystem will remove all configuration files! Continue? [confirm]
[OK]
BDCOM# reload
Proceed with reload? [confirm]

6. The OLT reboots with factory defaults:
   • Management IP: 192.168.1.1
   • Username: admin
   • Password: admin

Option C: Backup Config Before Reset (Best Practice)

If you have CLI access but not web access, export your config before resetting:

# View running config (copy the output and save to a .txt file)
BDCOM# show running-config

# Or backup to TFTP server (requires TFTP server running on 192.168.1.2)
BDCOM# copy running-config tftp://192.168.1.2/bdcom-backup.txt

How to Secure Your BDCOM OLT After First Login

Leaving the default admin/admin password on a production OLT is a serious security risk. A compromised OLT means all your ISP subscribers lose internet. Do these steps immediately after first access.

1. Change the Admin Password

BDCOM# configure terminal
BDCOM(config)# username admin privilege 15 password 0 StrongPassword2026!
BDCOM(config)# end
BDCOM# write memory

2. Change the Enable Password

BDCOM(config)# enable password 0 EnablePass2026!
BDCOM(config)# end
BDCOM# write memory

3. Change the Management IP (if needed)

BDCOM(config)# interface vlan 1
BDCOM(config-if)# ip address 10.10.10.1 255.255.255.0
BDCOM(config-if)# end
BDCOM# write memory

4. Disable Telnet, Enable SSH Only

BDCOM(config)# line vty 0 4
BDCOM(config-line)# transport input ssh
BDCOM(config-line)# end
BDCOM# write memory

5. Restrict Management Access by IP (ACL)

! Only allow management from your admin PC (10.10.10.100)
BDCOM(config)# access-list 10 permit 10.10.10.100
BDCOM(config)# line vty 0 4
BDCOM(config-line)# access-class 10 in
BDCOM(config-line)# end
BDCOM# write memory

What to Do After First Login — Checklist

5 Common Mistakes When Accessing BDCOM OLT

1. Plugging into the GPON port or SFP uplink instead of the MGMT port.
   GPON ports are for fiber SFP transceivers — they have a small square cage for SFP modules, not an RJ45 LAN port. The management port is a standard RJ45 Ethernet port, usually labeled MGMT or ETH. Check the front/rear panel label carefully.
2. Not setting the PC IP address manually.
   The BDCOM OLT management port does not have a DHCP server. It will not automatically assign your PC an IP address. You must manually set your PC to 192.168.1.2 with gateway 192.168.1.1 every time you connect directly.
3. Typing https://192.168.1.1 in the browser.
   BDCOM OLT web interfaces run on plain HTTP. https:// will give a “connection refused” or SSL error. Always use http://192.168.1.1.
4. Forgetting to run write memory after configuration changes.
   Changes made in CLI are in the running config only — they are lost on reboot. Always run write memory (or copy running-config startup-config) after every configuration session. This is the #1 cause of “my OLT config disappeared after a power cut.”
5. Doing a factory reset when the password is the only problem.
   A factory reset wipes all ONU bindings, GPON profiles, VLAN settings, and subscriber configurations. All connected fiber customers lose internet. If you just forgot the password, try console access first (see Password Reset section) — you may be able to change it without erasing anything.

BDCOM OLT Login Troubleshooting

Useful Diagnostic Commands

# Check current management IP
BDCOM# show ip interface brief

# Check current logged-in users / active sessions
BDCOM# show users

# Check OLT hardware and software version
BDCOM# show version

# Verify startup config is saved (should match running-config)
BDCOM# show startup-config

# Check GPON port status (all ONUs)
BDCOM# show gpon onu state

# Clear a stuck VTY session (replace X with line number from show users)
BDCOM# clear line vty X

BDCOM OLT in Nepal — Practical Notes

• Most common model: The BDCOM P3310C with 4 GPON ports is by far the most deployed OLT model among small ISPs in Nepal. The P3608 (8 ports) is also common for ISPs with more subscribers.
• Pairing with MikroTik: Most Nepal ISPs use a BDCOM OLT for GPON termination and a MikroTik router for PPPoE authentication, bandwidth management, and routing. The OLT uplink connects to MikroTik’s WAN port via fiber or Ethernet. See the MikroTik PPPoE Setup Guide for the router side.
• ONU issues: If your OLT is accessible but ONUs are offline, check the fiber connections and ONU status. A blinking red LOS LED on the ONU means the fiber signal is lost. See: ONU LOS Blinking Fix Guide.
• Power protection: BDCOM OLTs must be connected to a good UPS. Power fluctuations can corrupt the NVRAM where the startup config is stored — causing unexpected resets to default settings. A write memory habit and a stable UPS protect against this.
• Firmware updates: BDCOM releases firmware updates via their partner portal. Nepal ISPs typically get firmware through their local BDCOM distributor. Always test a new firmware on one device before rolling out to production OLTs.

Key Takeaways

• ✅ BDCOM OLT default login: username admin, password admin (or bdcom on P3608).
• ✅ Default management IP: 192.168.1.1. Set your PC to 192.168.1.2 to reach it.
• ✅ Always type http://192.168.1.1 — not https://.
• ✅ Connect to the MGMT Ethernet port — not the GPON SFP ports.
• ✅ After Telnet login, type enable + password to enter privileged mode (# prompt).
• ✅ Always run write memory after every configuration change — or changes are lost on reboot.
• ✅ If password is forgotten: use console cable + write erase to factory reset (erases all config).
• ✅ Change default password immediately on every production OLT — admin/admin is a real security risk.
• ✅ Disable Telnet, use SSH only for remote access.
• ✅ Use ACL to restrict management access to your admin IP only.

Frequently Asked Questions

Related Guides on Madankc.com.np

• 📌 ONU LOS Blinking — How to Fix Fiber Signal Loss (Nepal Guide)
• 📌 MikroTik Guides — Full Hub Page
• 📌 MikroTik PPPoE Setup for Nepal ISPs (WorldLink, Subisu, Vianet)
• 📌 MikroTik Hotspot Setup — Café & Hotel WiFi Guide
• 📌 MikroTik Firewall Rules for Beginners
• 📌 192.168.88.1 — MikroTik Default Login Guide

Official reference: BDCOM OLT Product Page — bdcom.com