| NoRestriction | Incoming calls will be accepted under two conditions:
- There is no restriction on the caller side
- Caller restriction is by class only
|
| CheckCUGID | Incoming calls can be received only if the caller's group number matches the group number of the receiver. |
| CheckRestrictionClassCode | Incoming calls are accepted only if the caller's class number is equal to or higher than the receiver's class number. |
| CheckBothCUGandRcCode | Incoming calls will be accepted if the caller's group number matches the receiver's group number and the caller's class number is equal to or higher than the receiver's class number. |
| InhibitAll | With this option, all incoming calls are rejected. |