ccDetailsRequiredIfIndex 1.3.6.1.4.1.207.8.4.4.4.37.1.1.12

The ifIndex of an ISDN interface on this router which is the required ISDN interface on which to make an outgoing call using this call details entry. The ifIndex, if not 0, must reference the ifEntry which contains information about the entire ISDN interface, at the lowest layer. If a channel is not available on this interface, the call fails. This object is not used on incoming calls. If the value of this object is set to 0, no interface will be required. If the value of this object does not reference the ifEntry for the entire ISDN interface, no interface will be required.