A comprehensive explanation of the functions of the Next Generation Metro optical fiber access network device

Fiber access network devices are still commonly used. So I have studied the functions of the next-generation Metro optical access network devices. I would like to share these functions with you here. I hope they will be useful to you. The ADM622 product series provides carrier-level devices with low costs and flexible services. The PM5337ADM622 and PM5338 ADM 622 PDH Optical Fiber access devices of PMC-sield are used for the remote deployment of SONET/SDH plug-in Multiplexing (ADM) and terminal multiplexing. The highly integrated ADM 622 device can help system designers build powerful, compact carrier-level devices and extend existing services and next-generation services to small and medium-sized enterprises.

Therefore, the online OEM of original equipment manufacturers will be able to obtain a rapid return on investment to meet the time needs to enter the market. GregAasen, Vice President and General Manager of PMC-sield service supply department, said: "by integrating the features required to build a complete ADM or terminal multiplexing into an optical fiber access network device, PMC-siider continues to promote the development and deployment of Carrier-level equipment costs continue to decline. The ADM622 product series promotes the deployment of traditional PDH and new services, such as Ethernet, while maintaining the effectiveness and reliability standards required by operators.

Advanced functions of optical fiber access network devices

ADM622 is the industry's first single-chip ADM for OC-3/STM-1 and OC-12/STM-4 cost optimization. Advanced feature settings and high integration of the ADM622 device are ideal for compact optical network devices deployed on remote terminals or client devices, because larger and more expensive MSPP services are not allowed. Moreover, the industry-standard SBI interconnect TR bus is directly connected to the PM4329 HDLIU 32 Device of PMC-siider and the PDH user interface. ADM 622 and ADM 622 PDH devices are integrated with the SONET/SDH frame generator and pointer processor, PDH er, extended interfaces and cross connectors. ADM 622 also integrates the SONET Ethernet (EoS) the interface is integrated with Layer 2 processing. The combination of these key factors can help manufacturers of optical fiber access network devices provide important features pursued by carriers: reliable customer service supply can be achieved through the existing infrastructure of operators, it provides flexible user interface support and good scalability for current and next-generation services.

Reliable network and device redundancy policies

The ADM622 device provides various network and device protection policies to support operators' requirements for redundancy of optical fiber access network devices. Two-way multi-rate OC-3/12 or STM-1/4 network interface integrated with 1 + 1 automatic protection switch, combined with 2G memory based VT/TU/STS/AU Crossover Connector, network Interfaces help support other network protection mechanisms such as UPSR/SNCP, BLSR/MS-SPRING and 1: n. In addition, the optical fiber access network device can work with a paired device that allows full redundancy between the device and the customer interface. These features provide device manufacturers with the required flexibility to build a single platform that is easy to configure and can collaborate with the network deployed by the operator.

Flexible User Interface Support

The ADM622 device supports a wide range of user interface signals to support existing PDH-based services and new Ethernet-based services.

Next-generation service

The layer-2 processors in ADM622 provide the functions of merging, directing, monitoring, and Ethernet operations, management, and maintenance. They can implement next-generation services without the need for external Ethernet switches or network processors. With a standard-based monitoring mechanism, carriers are currently able to provide 1 Mbit/s incremental service granularity, rather than 1.5 Mbit/s combined with virtual connection, 2 Mbit/s or 51.84 Mbit/s granularity. ADM622 also provides a mechanism to insert and obtain Ethernet OA & M packets to Ethernet data streams, allowing end-to-end monitoring and management of user signals over the network. In addition, ADM 622 provides the routing and merging function to enable virtual private line connections or multiple virtual line connections from a single Ethernet user interface.

System scaling and scalability

The ADM622 device provides two methods for system expansion and scaling, allowing operators to increase services without increasing costs. The four serial interfaces provided by the optical fiber access network device can operate independently at a rate of 622 Mbit/s or 2488 Mbit/s. This allows you to add additional user interfaces to the system in the future. The device is also equipped with an 8-bit, 77.76 MHz communication bus interface, providing additional flexibility for system designers.