PaidFeatures and CallFeatures are the two parameters that control many of the supplementary features available on the ATA.
The PaidFeatures parameter indicates whether the user has paid for the feature. This parameter is considered a feature's master switch.
If any PaidFeatures bit is set to 0", the corresponding feature is disabled and not available to the user.
The CallFeatures parameter indicates the default user settings. A CallFeatures bit set to 0 means that the feature default is turned OFF, while a bit set to 1 means that the feature default is turned ON. Depending on the feature, the user may be able to change the setting on a per-call basis.
In order to disable call waiting for port 1 only (bit 4) and port 2 (bit 20), the user must have this pattern: