Labels:text | screenshot | map | circle OCR: ATM NETWORK STANDARD INTERFACES Public ATM network B-ICI ATM UNI Public ATM CPE network Private ATly NNI network Figure 1. At present, there are three interface standards for use with public ATM networks. These are: the User-Network Interface (UNI), which connects Customer Premises Equipment (CPE) with the public ATM network; the Network-to-Node Interface (NNI), which connects public and private ATM networks; and the Broadband-Intercarrier Interface (B-ICI), for interfacing between two public ATM networks.