Section: 12.3 CN Identifier
Content: A CN node is uniquely identified within a PLMN by its CN Identifier (CN-Id). The CN-Id together with the PLMN identifier globally identifies the CN node. The CN-Id together with the PLMN-Id is used as the CN node identifier in RANAP signalling over the Iu interface. - Global CN-Id = PLMN-Id || CN-Id The CN-Id is defined by the operator, and set in the nodes via O&M. For the syntax description and the use of this identifier in RANAP signalling, see 3GPP TS 25.413[ UTRAN Iu interface Radio Access Network Application Part (RANAP) signalling ]  [17].