gvcIfDnaCugInterlockCode 1.3.6.1.4.1.562.2.4.1.107.5.2.10.1.3

This attribute specifies the Cug identifier of a national or international Cug call. It is an arbitrary number and it also can be called Cug in some descriptions. Interfaces (Dnas) with this number can make calls to Dnas with the same interlockCode.