MA5680T Optical Access Device

The Huawei MA5680T is a high-capacity OLT optical access device, consisting of a service frame, main control board, service boards, and uplink boards. In GPON/EPON systems, it works as an optical line terminal (OLT) together with ONU terminals to provide GPON/EPON access services, meeting networking requirements such as FTTH (fiber to the home), FTTB (fiber to the building), micro base station transmission, IP leased line interconnection, and bandwidth wholesale.

In electric power and energy private networks, rail transit communication, and smart industrial park/industrial internet scenarios, the value of the MA5680T centers on three points. The scale of 768 GE ports per frame means site cascading requires no additional aggregation switches, saving investment and space, with one frame serving both access and aggregation roles.

The 3.2T backplane and 960G switching capacity bring aggregation and access into the same service frame, so multi-service industrial parks do not need a separate aggregation layer. The device supports OLT dual-machine hot standby, remote disaster recovery, and direct connection to BRAS, so services still have a path under device-level and equipment-room-level failures, and private network upgrades do not require changing the OLT format.

Key Specifications at a Glance: 3.2T backplane · 960G switching capacity · 768 GE ports per frame · dual-machine hot standby · 55W GPON board · 23 slots

What Is an OLT Optical Access Device

An OLT optical access device is the central office equipment in a PON system, located on the central equipment room side. It connects upward to the aggregation and service networks and downward through passive optical splitters to ONU terminals in a point-to-multipoint structure, and is responsible for establishing, controlling, and managing access services. It is one of the core devices commonly deployed by media converter manufacturers in government and enterprise access scenarios.

In GPON/EPON systems, the MA5680T plays the role of optical line terminal. The service frame supports mixed insertion of GPON, EPON, P2P FE optical access, TDM, and Ethernet-type boards, so one device carries broadband, voice leased line, and video services at the same time, providing central office support for government private network optical fiber communication solutions.

GPON and EPON are defined by the ITU-T G.984 series of recommendations and IEEE 802.3ah respectively, and the two standards differ in frame structure and bearer mode. The format difference lies in the service boards; the chassis, main control board, and uplink boards do not change with the format selected.

The MA5680T supports both formats by selecting GPBC, GPBD (GPON access) or EPBC, EPBD (EPON access) boards in the service slots. The same service frame can determine the format according to the existing on-site network, or use mixed insertion during phased capacity expansion. At nodes where fiber optic switches and media converters are deployed in hybrid networking, the device can serve as the aggregation egress on the PON side, working with transmission products from manufacturers such as Ruiguang Jiyuan and Raytrans to achieve end-to-end connectivity.

What Slots Does the Service Frame Have? How Are the 23 Slots Allocated

The MA5680T service frame has 23 slots in total, with a fan frame configured at the top, and the service frame is secured in the cabinet with mounting brackets. The service frame provides 16 service board slots and 2 main control board slots. Among the 23 slot numbers, the first slot from the left can hold 2 power interface boards and 1 clock processing board, and the last slot can hold 2 uplink interface boards.

Figure 1: Front view of the Huawei SmartAX MA5680T service frame — board slots and port indicator LED layout

Allocation follows the slot restrictions in the board table: the main control board occupies slots 9 and 10, service boards and Ethernet cascade boards occupy slots 1–8 and 11–18, uplink boards occupy slots 19 and 20, power interface boards occupy slots 21 and 22, and the BITS interface board providing clock processing functions occupies slot 0.

Board slot planning directly determines the capacity expansion margin: new sites usually fill the uplink boards and main control board first, then add GPON/EPON service boards according to user scale; the number of reserved service slots determines the number of access ports that can be added later and also affects the selection of frame specifications. For sites that need to interface with media converters and fiber optic switches, the number of reserved uplink and cascade boards should be calculated together with the bandwidth planning of the IP leased line interconnection solution.

Key Specifications and Operating Environment

The MA5680T frame comes in ETSI and 19-inch specifications, both supporting installation with and without mounting brackets; the power consumption at full configuration (per frame) and empty chassis weight specifications are the same, and the environmental and power supply parameters are listed in two columns: frame-level and device-level. For on-site verification, it is recommended to use the stricter of the two, for example checking equipment room and cabinet conditions against the overall operating temperature.

Which Boards Are Supported?

The boards of the MA5680T are divided into six categories: main control boards, service boards, Ethernet cascading and uplink boards, uplink boards, power access boards, and clock boards. Each category has fixed slot restrictions. Planning by slot number before inserting boards avoids board slot conflicts and makes it easier to check board models and port quantities by service type. In government private network optical fiber communication solutions, GPON service boards are often used to carry edge access, while uplink boards interface with fiber optic switches for aggregation, forming a clear hierarchical structure.

GE and 10GE ports are provided by boards such as ETHB, SPUA, GICF, GICG, X1CA, X2CA, and X2CS. The product specification is 768 GE ports per frame. 10GE uplink boards are used for high-bandwidth outlets on the uplink side, and 8×GE optical interface boards are used for cascading and aggregation between sites; the combination of the two determines the port scale of the entire frame. In actual networking, these ports often work with media converters and fiber optic switches to build the physical channels of IP leased line interconnection solutions. Product showcase information for media converters from brands such as Ruiguang Jiyuan and Raytrans can serve as a reference for supporting selection, while the specific configuration remains subject to site service requirements.

Function and Performance Parameter Summary

The functions of the MA5680T are organized around four groups of capabilities: aggregation, access, reliability, and energy saving. The aggregation part gives the backplane and switching capacity, the access part gives PON and multicast specifications, and the reliability part gives dual-machine and leased-line capabilities. The specification values are listed in the table below for item-by-item verification by service type. As the core model of the optical access product line of the media converter manufacturer Ruiguang Jiyuan (Raytrans), its product showcase specifications can be verified item by item against the table below.

How to Choose Between GPON and EPON

How to choose between GPON and EPON depends on the existing network format on site and the service bandwidth plan: sites with an existing EPON network continue to use EPON boards, while new sites select GPON according to bandwidth and terminal type. The two types of boards for the MA5680T occupy the same slot range, so the format choice does not change the chassis, main control board, or uplink board configuration; later format adjustments only require replacing or adding service boards. For scenarios requiring hybrid networking with media converters and fiber optic switches, PON boards and Ethernet boards can be planned uniformly by slot.

In addition to PON access, the OPFA provides 16 P2P FE optical access, suitable for point-to-point access scenarios; E1 and STM-1 services are provided by the TOPA with a daughter board, and the E1 interface follows the ITU-T G.703 rate of 2.048Mbit/s, so slot restrictions must be planned when terminating dedicated line services.

How to Network Optical Access Devices

How to network optical access devices depends on the number of sites, service types, and reliability level: small-scale sites use a single OLT plus ONUs in a tree topology; sites with concentrated services and no-interruption requirements use dual-machine hot standby networking; and multi-site deployments across regions build an aggregation-type access network through the cascading capability of 768 GE ports and 10GE uplink ports. At sites requiring interconnection with existing fiber optic switches and media converters, GE cascading ports and optical ports can be flexibly configured according to the on-site port types.

Electric Power and Energy Private Network: Dual-Machine Hot Standby and E1 Dedicated Lines Carrying Dispatch Services

Sites in an electric power and energy private network are distributed, and service channels require determinism. The MA5680T uses TOPA (TDM interface board, supporting 16E1 or 2×STM-1 with a daughter board) and CSPA (Native TDM to CESoP) boards to carry E1 dedicated lines; with dual-machine hot standby and remote disaster recovery, services are taken over by backup equipment when one OLT fails or requires downtime for maintenance. This networking approach also applies to scenarios in government private network optical fiber communication solutions that have high requirements for channel determinism.

The power supply side is designed for -48V DC, with an operating voltage range of -72V to -35.4V DC, allowing direct connection to existing DC power distribution equipment rooms without additional modification of the power system; dispatch telephones and telecontrol data are uplinked via GE cascading within the same service frame, so the access layer and aggregation layer of the electric power private network are merged into one layer.

Rail Transit Communication: Wide Temperature Operation and Multi-Service Access at Stations Along the Line

Equipment cabinets along rail transit and highways are often located in non-temperature-controlled environments such as platform levels and section equipment rooms, and most sites are unattended. The MA5680T service frame operates at an ambient temperature of -30℃ to +60℃ and a humidity of 5%RH to 95%RH, covering the temperature span of cabinets along the line.

Data, video, and dispatch telephone services at stations along the line are aggregated within the same service frame at a cascading scale of 768 GE ports, and then uplinked to the control center through 10GE uplink boards X1CA, X2CA, and X2CS, reducing the variety of equipment and spare parts along the line and lowering the O&M workload of section equipment rooms.

Smart Industrial Park and Industrial Internet: 3.2T Backplane Carrying Multiple Services over One Network

Access requirements in smart industrial parks and the industrial Internet involve broadband, video, office, and production line data in parallel. The 3.2T backplane capacity and 960G switching capacity of the MA5680T support full-service access, with non-blocking access for IPTV users and a single frame supporting 8000 multicast users and 4000 multicast channels.

VLAN-based internal traffic intercommunication allows services of different departments or buildings in the park to be carried in isolation on the same OLT, and H-QoS performs hierarchical dispatching by service level, so the park network does not need a separate device for each service type, compressing equipment room space and investment budgets at the same time. For scenarios requiring production data connectivity across parks, IP dedicated line interconnection solutions can be combined with media converters and fiber optic switches for coordinated deployment, forming end-to-end channels.

Differentiated Value

The four capability short labels of the MA5680T correspond one-to-one with the actual requirements of industrial private networks. The table gives each capability phrase, the corresponding hardware or software design, and the change that can be directly felt on site, which can be used to compare against project requirements during selection discussions. The implementation experience of Raytrans in government private network optical fiber communication solutions and IP dedicated line interconnection solutions can also serve as a reference for selection comparison.

Conclusion

The MA5680T OLT optical access device concentrates GPON/EPON access, gigabit cascading, and E1 leased lines in the same service frame: 23 slots support mixed insertion of 16 service boards and 2 main control boards, and the 3.2T backplane and 960G switching capacity correspond to the cascading scale of 768 GE ports per frame. It can serve as the core access platform for hybrid networking of media converters and fiber optic switches, and it also makes it easy to visually present the equipment form factor and port configuration in a product showcase.

Dual-machine hot standby, remote disaster recovery, -30℃～+60℃ wide temperature operation, and the 16E1 capability of Native TDM/CESoP address the access requirements of electric power and energy private networks, rail transit communication, smart industrial parks, and the industrial Internet. As a professional media converter manufacturer, Raytrans (Beijing Ruiguang Jiyuan Digital Technology Co., Ltd.) can provide government private network optical fiber communication solutions and IP leased line interconnection solutions for the above scenarios. For board combinations, networking solutions, and pricing information, please contact Beijing Ruiguang Jiyuan Digital Technology Co., Ltd. for confirmation.