Automatic Secure Subscription
1) Begin with the headset OUT of the base and turned off
2) Simply place the headset into the charger and it will automatically subscribe to the base, making it the primary headset
The Power On/Subscription LED light on the base will flash white during the subscription process and become solid white when the new subscription is established.
Manual Over-the-Air Subscription

1) Begin with the headset OUT of the base and turned off
2) Press and hold the subscription button on the base for three seconds. The Power on/subscription light on the base will flash white
3) Press and hold the volume up button (for the CS540, toggle the volume switch in the volume up position) on the headset for three seconds until the headset LED turns solid white
4) When the Power on/subscription LED on the base becomes solid white, the headset and base are subscribed to one another
NOTE: If the subscription process times out after two minutes or if the subscription process fails, the subscription LED on the base will go dark for three seconds and then re-illuminate steadily to indicate power is applied to the base. If this occurs, try to re-subscribe the headset again.
If resubscription fails:
If you can't get the headset to resub, we have had success moving the power cord to another outlet, then trying again. Much like trying to fix the ORL12.
Stopping Subscription
If the base is in subscription mode and you want to stop the base from searching for a headset, press the subscription button again. The subscription LED on the base will go dark for three seconds and then re-illuminate steadily to indicate power is applied to the base.