CIC - Circuit Identity Code

The Circuit Identity Code is used to identify the trunk circuit to be connected. This variable is also used to associate the ISUP (ISDN User Part) messaging with a particular circuit. The CIC is an 8bit field within the SIF (Service Information Field) of the ISUP message. The coding of the CIC differs slightly between European and North American standards.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

Explore NetX today with a
free trial.
More Info about NetX