HUAWEI EX2 TN81EX2 TN8D000EX2 EX4 for Huawei PTN 1900 PTN1900 PTN 3900 PTN3900 ​ Product Description: 1.TN81EX2 Front Panel and Functions The TN81EX2 supports two 10G optical interfaces, and uses the LC optical fiber connector. It forwards data packets. For the data packets, the TN81EX2 supports QoS functions such as traffic management, congestion control, and queue scheduling. 2.Appearance Figure 1 shows the appearance of the front panel of the TN81EX2. Figure 1 Appearance of the front panel of the TN81EX2 3.Indicators The following indicators are present on the front panel of the TN81EX2. STAT indicator, red, green, or orange, which indicates the working status ACT indicator, green, which indicates the service activation status PROG indicator, red or green, which indicates the running status of the program SRV indicator, red, green, or orange, which indicates the service status L/A1 and L/A2 indicators, green or orange, which indicate the receiving, transmitting, and connection states of the data. For details on indications of indicators, see Board Indicators. 4.Interfaces Two XFP interfaces, which slope downwards 35 degrees, are present on the TN81EX2. Table 1 lists the types and usage of the interfaces. For fiber corresponding to the interfaces, see Types of Fiber. Table 1 Types and usage of the interfaces on the TN81EX2 Interface on the Front Panel Interface Type Usage IN1 - IN2 LC Receive 10GE optical signals. OUT1 - OUT2 LC Transmit 10GE optical signals. NOTE: The XFP interface should be used with an optical module. Two LC interfaces are provided on the left and right sides of the optical module. Each interface uses one fiber, which is used to transmit or receive service signals. When a two-fiber bidirectional optical module is used, two LC interfaces are provided on the left and right sides of the optical module. Each interface uses one fiber, which is used to transmit or receive service signals. When a single-fiber bidirectional optical module is used, only one LC interface is provided on the left side of the optical module. This optical interface uses only one fiber, which is used to transmit and receive service signals at the same time. Functions and Features: Table 2 lists the functions and features of the TN81EX2. Table 2 Functions and features of the TN81EX2 Function and Feature Description Basic function Service interfaces on the front panel Two 10GE interfaces. Processing capability Full-duplex 20 Gbit/s DCN The inband DCN is supported. By default, the two ports on the board are enabled with the DCN function, and the DCN function can be automatically enabled or disabled. Interface function Working mode 10G Full-Duplex LAN, 10G Full-Duplex WAN Automatic laser shutdown Supported Type of the loopback at the port PHY layer inloop and outloop MAC layer inloop Automatic loopback release on interfaces Supported Interface bandwidth usage statistics Supported MTU 46 bytes to 9000 bytes Leveled port bandwidth threshold-crossing alarms Supported Performance statistics based on different priorities Supported 1.Working Principle and Signal Flow The TN81EX2 mainly consists of the network management module, transmission management module, switching buffer module, management module, power supply module, and clock module. Figure 1 shows the block diagram for the working principle of the TN81EX2. Figure 1 Block diagram for the working principle of the TN81EX2 2.In the Transmit Direction The cross-connect buffer module processes the cells sent by the cross-connect unit and then sends the cells to the transmission management module. The transmission management module rearranges the cells to recover packets, for which the buffer and QoS management are performed. The packets are then sent to the network processing module. The network processing module performs the coding/decoding and the serial/parallel conversion for the data, and then sends the data to the 10 GE optical interface. 3.In the Receive Direction The network processing module performs the O/E conversion for the Ethernet optical signals from the port of the Ethernet equipment, and performs the coding/decoding and the serial/parallel conversion for the data. The network processing module also performs route searching and address matching for the data packets, and transmits the corresponding packets to the transmission management module. After the transmission management module buffers and schedules the packets, the transmission management module slices the packets into cells required by the switching network. After the switching buffer module buffers the cells, the cells are then sent to the cross-connect unit. 4.Network Processing Module The functions supported by this module are listed as follows: In the receive direction, performs the O/E conversion for the 10GE Ethernet optical signals from the port of the Ethernet equipment (switch or router), and performs the coding/decoding.In the transmit direction, perform the coding and parallel/serial conversion on the signals from the transmission management module, and then perform the O/E conversion and transmit the signals. 5.Performs route searching and address matching for the data packet. Extracts the synchronous Ethernet clock signals. Extracts the IEEE 1588 V2 packets. Transmission Management Module This module slices packets into cells, and performs the QoS, line rate forwarding, and large volume buffer functions. The functions supported by this module are listed as follows: QoS: This module provides functions of scheduling services and restricting the bandwidth, which include the flow queues and port queues. In addition, this module provides the statistics information accordingly. Line rate forwarding: This module can bi-directionally transmit and receive packets at the full line rate, that is, 20 Gbit/s. Large volume buffer: This module supports 50-ms buffer in the case of 20 Gbit/s traffic. 6.Switching Buffer Module This module mainly performs buffer, queue management, and scheduling for cells. This module and the cross-connect unit form a three-level switching fabric to switch cells. Management Module This module provides buses, such as the parallel management bus and Ethernet communication bus, to manage other modules on the board. This module also monitors and reports alarms and performance events to the system control unit. 7.Clock Module The functions supported by this module are listed as follows: Provides clock signals for each module of the board. Supports the synchronous Ethernet. Supports the IEEE 1588 V2 protocol. Supports the 1588 ACR clock. 8.Power Supply Module This module converts the input DC voltage into various DC voltages required by each module on the board. Valid Slots Two slots house one TN81EX2. On the U2000, the two slots are displayed as the one with the smaller number. For example, slots 3 and 4 house the TN81EX2. On the U2000, only slot 3 is displayed. Table 1 lists the valid slots for the TN81EX2. Table 1 Valid slots for the TN81EX2 Slots for the TN81EX2 Remarks Slots 5 Slot 5 actually represents slot 5 and slot 6. The board housed in these two slots provides interfaces on the front panel. Slots 7 Slot 7 actually represents slot 7 and slot 8. The board housed in these two slots provides interfaces on the front panel. Slots 11 Slot 11 actually represents slot 11 and slot 12. The board housed in these two slots provides interfaces on the front panel. Sots 13 Slot 13 actually represents slot 13 and slot 14. The board housed in these two slots provides interfaces on the front panel. Product Detail: If you are interested, please let us know the specific model. We will provide the best service and the best price! Pr
