This is applicable to you if your telephone is connected to the Optical Network Terminal (ONT) or Optical Network Router (ONR).​

1. Switch off and on your network devices (i.e. ONT or ONR). Wait up to 3 mins for them to restore.​

2. Look for a green light on the Tel 1 or Tel 2 port of your network devices and ensure you have securely connected your telephone RJ11 cable to the port with light.

You will see a green light on Tel 1 or Tel 2 port of your ONT or ONR, and you will not hear a persistent dial tone after dialling.