Hong Telecom Equipment Service LTD

Enterprise DDN private line service is converted to E1 signals. ONUs access the E1 signals and transmit them in Native TDM mode. Service Requirement： The DDN private line service is widely used in financial departments, governments, and enterprises that require highly real-time data switching. It provides a rate from 64 kbit/s to 2Mbit/s. GPON access in OLT+ONU mode can access the DDN private line service along with other data services and voice service. This access mode does not require independent maintenance of the DDN network, simplifying network architecture. Application Scenario： As shown as below, a protocol converter is deployed between an ONU and DDN node machine to convert DDN private line services to E1 services. The ONU accesses the E1 services and encapsulates the service packets in TDM over GEM mode and then transmits the packets to the OLT. The OLT decapsulates the service packets to E1 data and transmits the data to the SDH network through upstream E1/STM-1 ports...