Optical fiber covered wire transmission equipment with PCM (Pulse Code Modulation) function

Abstract

The utility model discloses optical fiber covered wire transmission equipment with a PCM function, which comprises a case, the case is provided with a case front panel and a case rear panel which are opposite to each other, an FPGA core board, a main control board and a power board which are connected through an inter-board connector are arranged in the case, the FPGA core board is provided with an FPGA chip and an Ethernet interface unit, and the Ethernet interface unit is connected with the FPGA chip. The main control board is provided with an optical interface unit, an E1 interface unit, a voice interface unit and a covered wire interface unit, a rear panel of the case is provided with an Ethernet port, an optical port, an E1 port, a PCM voice port, a covered wire voice port and a covered wire port, the FPGA chip is connected with the Ethernet port through the main control board via the Ethernet interface unit, the FPGA chip is connected with the optical port through the optical interface unit, and the FPGA chip is connected with the covered wire port through the optical interface unit. The optical fiber coated wire is connected with the PCM voice port through the E1 interface unit, is connected with the PCM voice port and the coated wire voice port through the voice interface unit, and is connected with the coated wire port through the coated wire interface unit, so that the transmission function of the optical fiber coated wire and the related functions of the PCM voice equipment can be realized at the same time, and the use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber multi-line transmission, in particular to optical fiber multi-line transmission equipment with PCM function. Background Art

[0002] Field covered wire, short for "field covered wire," is lightweight, easy to carry and retract, and resistant to cold, heat, and abrasion. It's often used for temporary, short-range, low-capacity communications during field operations like military operations, mining, and exploration. Optical fiber communication, on the other hand, offers high bandwidth, large capacity, long-distance transmission, and strong anti-interference capabilities.

[0003] Traditional fiber-optic duplexing equipment, which combines optical fiber and duplexed wire, offers complementary advantages in service transmission. However, existing technologies, such as patent CN 220823077 U, also disclose a fiber-optic duplexing transmission device, but it lacks PCM voice transmission capabilities. Therefore, if PCM voice transmission is required, additional PCM voice equipment must be configured. This limits its use cases and makes it inconvenient. Furthermore, it can be difficult to access in complex scenarios. Utility Model Content

[0004] The embodiment of the present application provides an optical fiber multi-line transmission device with PCM function. On the basis of the optical fiber multi-line transmission function, it directly integrates units and interfaces related to voice services, so that the optical fiber multi-line transmission device can be directly used as a PCM device. No additional PCM voice equipment needs to be configured to complete the networking application. The function is more complete, the difficulty of networking is greatly reduced, and the use is more convenient.

[0005] An embodiment of the present application provides an optical fiber multiplexing transmission device with PCM function, including a chassis, wherein the chassis is provided with a relative chassis front panel and chassis rear panel, and an FPGA core board, a main control board and a power supply board connected by an inter-board connector are provided in the chassis, an FPGA chip and an Ethernet interface unit are provided on the FPGA core board, an optical interface unit, an E1 interface unit, a voice interface unit and a multiplexing interface unit are provided on the main control board, and an Ethernet port, an optical port, an E1 port, a PCM voice port, a multiplexing voice port and a multiplexing port are provided on the chassis rear panel. The FPGA chip is connected to the Ethernet port through the Ethernet interface unit and the main control board, the FPGA chip is connected to the optical port through the optical interface unit, and is connected to the E1 port through the E1 interface unit, and is connected to the PCM voice port and the multiplexing voice port through the voice interface unit, and is connected to the multiplexing port through the multiplexing interface unit.

[0006] In a possible implementation, an indicator light board is installed in the front panel of the chassis, and the FPGA core board is connected to the indicator light board through the main control board.

[0007] In a possible implementation, a clock unit is further provided on the FPGA core board, and the clock unit is connected to the FPGA chip and the Ethernet interface unit via clock pins respectively.

[0008] In one possible implementation, the voice interface unit is connected to the PCM voice port and the double-line voice port through a PCM voice thick film and a double-line voice thick film respectively, wherein the PCM voice thick film and the PCM voice port are provided in plurality and are connected to each other one-to-one, and the voice interface unit is connected to the FPGA core board through a clock, a time slot and a voice bus.

[0009] In one possible implementation, a network management interface unit is also provided in the main control board, and a monitoring network port and an RS232 serial port are provided on the rear panel of the chassis. The network management interface unit is connected to the multiplexed line interface unit via RS232, and the network management interface unit is connected to the indicator light board via the IO port. The network management interface unit is connected to the monitoring network port and the RS232 serial port, and is also connected to the FPGA chip.

[0010] In a possible implementation, the optical interface unit is configured as an optical module SFP0 / 1, and is connected to the FPGA core board via a SERDES interface.

[0011] Beneficial effect: Compared with the existing technology, the optical fiber duplex transmission equipment with PCM function provided by the present application sets a voice interface unit in the main control board and sets a PCM voice port on the rear panel of the chassis, wherein the FPGA chip is connected to the PCM voice port through the voice interface unit, which can additionally realize the PCM function of the voice service and the function of long-distance transmission of the voice service through optical fiber after E1 time slot allocation. It can be used directly as a PCM device, and the networking application can be completed without the need for additional configuration of PCM voice equipment. The function is more complete, can effectively reduce the difficulty of networking, and is more convenient to use.

[0012] These and other purposes, features and advantages of the present invention are fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure shows the structure of the optical fiber multi-line transmission device with PCM function of the present application.

[0014] Figure 2 The figure shows the structural connection diagram of the FPGA core board in this application.

[0015] Figure 3 It shows a schematic diagram of the structural connection of the main control board in this application. DETAILED DESCRIPTION

[0016] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0017] Those skilled in the art should understand that, in the disclosure of the specification, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0018] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0019] refer to Figures 1 to 3 The embodiment of the present application provides an optical fiber multi-line transmission device with PCM function, which realizes the E1 or optical fiber transmission function of voice service, that is, realizes the PCM function and PCM optical transmission function, and simplifies the environmental configuration work when the equipment is used.

[0020] Specifically, the optical fiber multi-line transmission equipment with PCM function includes a chassis. The chassis is provided with a relative chassis front panel (located at the front side) and a chassis rear panel (located at the rear side). The chassis is provided with an FPGA core board, a main control board and a power supply board connected by an inter-board connector, wherein the power supply board is used to convert an external power supply AC 220V or DC 24V to +12V, wherein the main control board is connected to the FPGA core board through an inter-board connector I, wherein the power board is connected to the FPGA core board and the main control board through an inter-board connector II, wherein the DC / DC conversion module I in the main control board completes the conversion work of the +12V voltage to the voltage required in the board. In addition, the FPGA core board is provided with an FPGA chip and an Ethernet interface unit, and the main control board is provided with an optical interface unit, an E1 interface unit, a voice interface unit and a multiplexed line interface unit, and the rear panel of the chassis is provided with an Ethernet port, an optical port, an E1 port, a PCM voice port, a multiplexed line voice port and a multiplexed line port, wherein the FPGA chip is connected to the Ethernet port through the Ethernet interface unit and through the main control board, wherein the FPGA chip is connected to the optical port through the optical interface unit, and is connected to the E1 port through the E1 interface unit, and is connected to the PCM voice port and the multiplexed line voice port through the voice interface unit, and is connected to the multiplexed line port through the multiplexed line interface unit. Therefore, the optical fiber multiplexing transmission equipment with PCM function provided by this application can simultaneously provide optical fiber transmission or multiplexing transmission functions of PCM voice services, multiplexing voice services, Ethernet services, and E1 services, and has the ability to interconnect with the same-system equipment with one or more of the above-mentioned services (Ethernet, voice, E1, optical fiber, multiplexing) transmission modes. There is no need to set up additional PCM voice equipment, the services are more diverse, the applications are wider, it can meet the access needs of various complex scenarios, and it is more convenient to use.

[0021] In one embodiment, an indicator light board is installed within the chassis front panel. The FPGA core board is connected to the indicator light board via the main control board. The operating status of the FPGA chip, as well as the operating status of Ethernet, optical, duplexed, and voice services, can be directly communicated to the main control board and indicator light board via the management bus, making it easy for staff to view and use.

[0022] In one embodiment, the FPGA core board is further provided with a clock unit. The clock unit is connected to the FPGA chip and the Ethernet interface unit via clock pins, respectively, so that the clock unit can provide a working clock to the FPGA chip and the Ethernet interface unit.

[0023] The FPGA chip is used to complete the framing / deframing operations of voice / E1 / Ethernet on the optical fiber, realize the transmission of optical fiber data through the SERDES interface, and complete the framing / deframing processing of voice / E1 / Ethernet. It realizes the transmission of multiplexed services through the DSL_TDM interface, and completes the access of voice data through the clock, time slot and data bus, thereby realizing the time slot allocation on the E1. At the same time, the working status of the FPGA chip, as well as the working status of Ethernet, optical, multiplexed and voice services, is notified to the main control board and indicator board through the management bus.

[0024] The Ethernet interface unit is connected to the FPGA chip through the GMII interface to realize the conversion from the GMII interface to 1000Base-T, and is connected to the FPGA chip through the MDC interface to realize the monitoring of the working status of the PHY chip 1 / 2 / 3.

[0025] In one embodiment, the voice interface unit is connected to the PCM voice port and the double-line voice port through a PCM voice thick film and a double-line voice thick film respectively, wherein the PCM voice thick film and the PCM voice port are provided in plurality and are connected to each other in a one-to-one correspondence. Figure 3 For example, six PCM voice thick films and six PCM voice ports are provided in a one-to-one correspondence. The voice interface unit is connected to the FPGA core board via a clock, time slot, and voice bus. When six PCM voice thick films and six PCM voice ports are provided in a one-to-one correspondence, there are seven groups of clocks, time slots, and voice buses. One group is used to connect to the multiplexed voice thick films, and the other six groups are connected to the six PCM voice thick films, respectively. The PCM voice thick films and the multiplexed voice thick films convert the clock, time slot, and voice bus into two-wire voice ports that are connected to the PCM voice ports and the multiplexed voice ports on the rear panel of the chassis.

[0026] The multiplexing interface unit is configured as a GD32 chip and a multiplexing chip, wherein the GD32 chip and the multiplexing chip are interconnected through the FSMC interface. The GD32 chip is used to obtain the multiplexing link status in real time to realize the link disconnection, training and link establishment actions of the multiplexing line, while the multiplexing chip is used to complete the multiplexing transmission of data.

[0027] In one embodiment, a network management interface unit is further provided within the main control board. The chassis rear panel is provided with a monitoring network port and an RS232 serial port. The network management interface unit is connected to the multiplexed line interface unit via an RS232. The network management interface unit is connected to the indicator light board via an IO port. The network management interface unit is connected to the monitoring network port and the RS232 serial port, and is also connected to the FPGA chip.

[0028] The network management interface unit (NMU) monitors the device and uses the FPGA chip to obtain the status of each service managed by the FPGA. The RS232 serial port allows staff to directly perform debugging. Specifically, the NMU consists of an LS1B chip and a PHY0 chip. The PHY0 chip converts the Ethernet interface into an MII interface, enabling device management. It also configures voice services for E1 transmission, fiber transmission, or multiplexing, and configures the multiplexing end (master / slave / auto) and rate. It also configures the voice service loopback, power supply, and magnet mode. It also monitors the ringing, off-hook, and on-hook status of voice services, as well as real-time monitoring of the Ethernet port, optical port, and multiplexing status. It also enables online device upgrades.

[0029] In one embodiment, the optical interface unit is configured as an optical module SFP0 / 1, which is connected to the FPGA core board via a SERDES interface. The optical module SFP0 / 1 converts the electrical signal of the SERDES interface into an optical signal and then connects it to the optical port on the rear panel of the chassis.

[0030] The E1 interface unit consists of a code source conversion thick film, which converts 4 channels of NRZ code into HDB3 code and connects to 4 external E1 interfaces.

[0031] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are provided for illustrative purposes only and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An optical fiber multi-line transmission device with PCM function, comprising a chassis, wherein the chassis is provided with a front panel and a rear panel opposite to each other, characterized in that: The chassis is provided with an FPGA core board, a main control board and a power supply board connected by an inter-board connector. The FPGA core board is provided with an FPGA chip and an Ethernet interface unit. The main control board is provided with an optical interface unit, an E1 interface unit, a voice interface unit and a multiplexed line interface unit. The rear panel of the chassis is provided with an Ethernet port, an optical port, an E1 port, a PCM voice port, a multiplexed line voice port and a multiplexed line port. The FPGA chip is connected to the Ethernet port through the Ethernet interface unit and the main control board. The FPGA chip is connected to the optical port through the optical interface unit, the E1 port through the E1 interface unit, the PCM voice port and the multiplexed line voice port through the voice interface unit, and the multiplexed line port through the multiplexed line interface unit.

2. The optical fiber multiplexed transmission device with PCM function according to claim 1, characterized in that: An indicator light board is installed in the front panel of the chassis, and the FPGA core board is connected to the indicator light board through the main control board.

3. The optical fiber multiplexed transmission device with PCM function according to claim 2, characterized in that: The FPGA core board is also provided with a clock unit, and the clock unit is connected to the FPGA chip and the Ethernet interface unit through clock pins respectively.

4. The optical fiber multiplexed transmission device with PCM function according to claim 3, characterized in that: The voice interface unit is connected to the PCM voice port and the double-line voice port through the PCM voice thick film and the double-line voice thick film respectively, wherein the PCM voice thick film and the PCM voice port are provided in plurality and are connected to each other one-to-one, and the voice interface unit is connected to the FPGA core board through the clock, time slot and voice bus.

5. The optical fiber multiplexed transmission device with PCM function according to claim 2, characterized in that: A network management interface unit is also provided in the main control board, and a monitoring network port and an RS232 serial port are provided on the rear panel of the chassis. The network management interface unit is connected to the multiplexed line interface unit via RS232, and the network management interface unit is connected to the indicator light board via the IO port. The network management interface unit is connected to the monitoring network port and the RS232 serial port, and is also connected to the FPGA chip.

6. The optical fiber multiplexed transmission device with PCM function according to claim 5, characterized in that: The optical interface unit is configured as an optical module SFP0 / 1 and is connected to the FPGA core board via a SERDES interface.

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