The Openreach ONT (Optical Network Termination), is a small white box that terminates the incoming fibre optic cable. It's provided, managed and supported by Openreach.
Your Giganet UltraHub router or your own router connects to this.
There are several lights on the ONT, when these lights change colour or flash, it means something is happening.
There are five different versions of Openreach ONT; they all work in the same way, but the type and number of lights may vary between devices.
|
Light |
Status |
Meaning |
What to do if broadband or phone is not working |
|---|---|---|---|
|
POWER (right-hand light) |
Green |
Openreach fibre ONT is on. |
Check PON and LOS status below. |
|
Off |
Openreach fibre ONT is off. |
Check the mains plug is in. |
|
|
PON and LOS (left-hand lights) |
PON solid green |
Fibre optic link to the exchange is working and recognises your Openreach fibre ONT. |
Check physical connection at both ends of the cable between the Openreach fibre ONT and your router. Try a new cable if needed. |
|
PON flashing and LOS off |
Openreach fibre ONT is communicating with exchange for verification. |
Wait until light turns solid green. |
|
|
PON off/ LOS red/ PON and LOS both flashing |
Fibre optic link is not connected or there's a problem between your property and the exchange. |
Check that the thin white fibre optic cable coming into your Openreach ONT is inserted and not damaged. Turn the Openreach ONT power off, then back on and wait five minutes for the Openreach ONT to attempt to reconnect. |
|
|
PORT1-PORT4 |
On (any) |
Ethernet connection is normal between Openreach ONT and your router (Port 1 is where engineer will install). |
There may be a connection problem - check your Router. |
|
Blinking (any) |
Data is being transmitted through the port. |
There may be a connection problem - check your Router. |
|
|
Off (all) |
Ethernet cable to your Router is not inserted or broken. |
Check physical connection at both ends of the cable. Try new cable if needed. |
|
|
TEL 1-2 |
Giganet does not use or activate the telephone ports on the Openreach ONT, so please ignore all lights on the ONT relating to TEL. If you subscribe to Giganet Home Phone, please check the phone status on the UltraHUB 2 router. |
||
|
Optical |
Green solid |
Connected |
Check physical connection at both ends of the cable between the Openreach ONT. Try a new cable if needed. |
Glossary
| LOS | Loss of service |
| ONT | Optical Network Termination - the small white Openreach box that connects between the incoming fibre optic cable and your router. |
| PON | Passive Optical Network - the full fibre broadband technology |
| TEL | Telephone |
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