Indicates the whether Overlap Digits reception is enabled or not.

Valid values are: DISABLED and ENABLED When set to ENABLED, Inbound PSTN calls requesting Overlap digits collection will be accepted by the gateway. Also inbound PSTN calls with en-bloc digits will be accepted. If this parameter is set to DISABLED, only inbound PSTN calls with en-bloc digits will be accepted by the gateway and all calls requesting Overlap digits reception will be rejected with ISDN cause code 28(invalid number format - address incomplete).