Rules on the terms and conditions for provision and use of the network functions “Calling Line Identification” (CLI), “Connected Line Identification” (COL) and “Dual-Tone Multi-Frequency” (DTMF)

The Rules lay down the terms and conditions for provision and use of the network functions Calling Line Identification (CLI), Connected Line Identification (COL) and Dual-Tone Multi-Frequency (DTMF) dialling in public electronic communications networks. It also provides the requirements for transmission of CLI and COL through interconnection points and sets up arrangements for provision by the operators of the functions CLIP/CLIR and COLP/COLR to the end users.