To help the U2000 Web LCT to manage NEs in a network, the embedded control channel (ECC) transmits operation, administration and maintenance (OAM) information by using the D bytes.
The HWECC protocol is mainly applied to transmit OAM information between Huawei optical equipment. The HWECC protocol stake itself does not recognize the OAM information of the third-party equipment. When the networking involves third-party equipment, the OAM information cannot be interconnected but Huawei optical equipment can transparently transmit the OAM information of the third-party equipment. Hence, customers can use the current DCC resources to manage all equipment.