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OLT & ONU Management
Zal Ultra connects to your fiber OLTs and shows every ONU behind them: whether it is online, its optical signal (RX/TX power), temperature and more. You can link each ONU to a subscriber, so the subscriber's profile shows the health of their fiber connection.
Zal Ultra reads information from the OLT over SNMP. It does not change anything on the OLT: it does not authorize, configure or reboot ONUs.
What you can do
| Task | Where |
|---|---|
| Add your OLTs and check the connection | Network → OLTs — see Add an OLT |
| Find all ONUs on an OLT | Discover ONUs on the OLT — see ONUs |
| See ONU status and signal for every ONU | Network → ONUs — see ONUs |
| See an ONU's signal history | ONU details page — see ONUs |
| Link an ONU to a subscriber | Map to Subscriber — see Map ONUs to Subscribers |
| See a subscriber's ONU signal | Subscriber profile → ONU Details — see Map ONUs to Subscribers |
| Fix common problems | Troubleshooting |
Supported OLTs
| Vendor | Support | Models with their own settings |
|---|---|---|
| V-Sol | Full | GPON: V1600GI series, V1600D4 · EPON: V1600G0-B, V1600D4-L, V1601E04 / V1601E04-DP · other V-Sol models use the standard V-Sol GPON or EPON settings |
| Huawei | Full (GPON) | MA5800 series, MA5680T / MA5683T, MA5608T · other Huawei models use the standard Huawei settings |
| BDCOM | Basic | Signal readings (RX/TX power); ONU status may show Unknown |
| ZTE | Basic | C300 / C320 GPON |
| Nokia, C-Data, Ecom | Not supported yet | They appear in the vendor list, but discovery does not work for them yet |
C-Data OLTs
Many C-Data OLTs run V-Sol firmware. Click Test Connection on the OLT: if the result shows Vendor: V-Sol, edit the OLT and choose V-Sol as the vendor.
What Zal Ultra reads for each ONU
| Reading | V-Sol | Huawei | BDCOM | ZTE |
|---|---|---|---|---|
| Status (online / offline / LOS / dying gasp) | Yes | Yes | Limited | At discovery |
| RX power and TX power | Yes | Yes | Yes | Yes |
| Temperature, voltage, current | Yes (not on V1600D4 GPON) | Yes | EPON only | Yes |
| Distance | Yes | Yes | EPON only | Yes |
| MAC address / serial number | Yes | Serial number | Yes | Serial number |
| Slot, PON port and ONU ID | Yes | Yes | Yes | Yes |
ONU names or descriptions, ONU model, firmware and uptime are not read.
Requirements
On the OLT:
- SNMP v2c enabled. SNMP v3 is not supported yet.
- A read-only community string (for example
public). Write access is not needed. - SNMP on the standard port UDP 161.
- SNMP access allowed from your Zal Ultra server's IP address.
On the network: the Zal Ultra server must be able to reach the OLT's IP address on UDP port 161 (through your routing, VPN or firewall rules).
Permissions
The OLT and ONU pages are under Network in the sidebar, for admins and admin staff. To show them to a staff role, open Roles, edit the role, go to the Network tab and tick:
- OLT Management → Module to show OLTs
- ONU Management → Module to show ONUs
What Zal Ultra does automatically
For every OLT whose status is Enabled:
| Every | What happens |
|---|---|
| 5 minutes | Checks that the OLT answers and updates its Online / Offline connection status |
| 30 minutes | Reads the latest signal, status and temperature of all its ONUs and saves a history point |
| Hour | Discovers new ONUs on the OLT (online OLTs only) |
Opening a subscriber's profile also refreshes the readings of their ONU.
To stop all automatic checks for an OLT (for example during maintenance), edit it and set Status to Disabled.
Signal quality
Zal Ultra grades each ONU's signal from its RX power (the light the ONU receives):
| RX power | Signal | Badge |
|---|---|---|
| −15 dBm or higher | Excellent | Green |
| −15 to −20 dBm | Good | Blue |
| −20 to −25 dBm | Fair | Yellow |
| −25 to −28 dBm | Poor | Light red |
| below −28 dBm | Critical | Red |
| no reading | Unknown | Grey |
Poor and Critical ONUs usually need a visit: check the fiber, connectors and splitters.
Using the API
OLT and ONU information is also available through the OLT/ONU API.