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TN17LTXT52 Is Huawei OSN 9800 LTX Board
LTX: 10-Port 10 Gbit/s Service Multiplexing & Optical Wavelength Conversion Board
The available functional version of the LTX board is /TN11/TN12/TN15/TN17.
The LTX board is a wavelength conversion board and applies to coherent systems. In the receive direction, the board can receive ten 10GE LAN, 10GE WAN, STM-64, OTU2/OTU2e, FC1200/FC800, InfiniBand 5G, or OC-192 signals from client equipment, maps the optical signals into an OTU4 signal, and converts the OTU4 signal into a standard DWDM wavelength compliant with ITU-T G.694.1. In the transmit direction, the process is reverse. The LTX board can also apply to electrical regeneration sites to perform electrical regeneration of OTU4 optical signals.
The WDM-side service rate for the LTX board is 100 Gbit/s. Therefore, the board is intended for 100G transmission systems.
The LTX board is mainly used to achieve wavelength tunable and to provide OTN interfaces and ESC.
The LTX board consists of the client-side optical module, WDM-side optical module, signal processing module, control and communication module, and power supply module.
In the signal flow of the LTX board, the transmit and the receive directions are defined. The transmit direction is defined as the direction from the client side of the LTX to the WDM side of the LTX, and the receive direction is defined as the reverse direction.
Transmit direction:
The client-side optical module receives 10 channels of the optical signals from client equipment through the RX1-RX10 interfaces, and performs O/E conversion.
After performing the O/E conversion, the client-side optical module sends the electrical signals to the signal processing module. Then, the signal processing module performs encapsulation, OTN framing, and FEC encoding and outputs one channel of OTU4 signals to the WDM-side optical module.
After receiving the OTU4 signals, the WDM-side optical module performs E/O conversion, generates OTU4 signals over a DWDM wavelength that complies with ITU-T G.694.1, and then outputs the OTU4 signals through the OUT optical interfaces.
Receive direction:
The WDM-side optical module receives one channel of standard DWDM optical signals compliant with ITU-T G.694.1 through the IN optical interfaces. The WDM-side optical module then converts the optical signals into electrical signals.
After the O/E conversion, the electrical signals are sent to the signal processing module, which performs OTU4 framing, FEC decoding, demapping, and decapsulation for the signals and then outputs 10 channels of client electrical signals.
The 10 channels of client electrical signals are sent to the client-side optical module, which converts the electrical signals into optical signals and then outputs the optical signals through the TX1-TX10 optical interfaces.
The LTX board implements the regeneration of one channel of unidirectional optical signals. The wavelengths at the receive and transmit ends of the board are OTU4 optical signals at DWDM standard wavelengths that comply with ITU-T G.694.1.
The optical receiving module receives the optical signals to be regenerated through the IN interface, and performs O/E conversion.
The signal processing module performs decoding, overhead processing and encoding of signals. During the process, the reshaping, regenerating and retiming based on electrical signals are performed, and the signals are encapsulated into OTN frames.
After encoding, the signals are sent to an optical transmitting module. After performing E/O conversion, the module transmits OTU4 signals at DWDM standard wavelengths that comply with ITU-T G.694.1.
The optical signals are output through the OUT interface.
There are indicators and interfaces on the front panel of the LTX board.
OSN 9800 universal platform subrack: The LTX boards for transmitting and receiving the same wavelength must be installed in slots IU2 and IU4, IU6 and IU8, IU10 and IU12, IU14 and IU16.
TN11LTX/TN12LTX: 264.6 mm (10.4 in.) x 101.6 mm (4.0 in.) x 220 mm (8.7 in.)
TN15LTX/TN17LTX: 264.6 mm (10.4 in.) x 50.8 mm (2.0 in.) x 220 mm (8.7 in.)
TN11LTX/TN12LTX: 5.8 kg (12.8 lb.)
TN15LTX: 3 kg (6.6 lb.)
TN17LTX: 2.7 kg (5.96 lb.)
Function and Feature
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Function and Feature |
Description |
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Basic function |
LTX converts signal as follows:
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Client-side service type |
10GE LAN: Ethernet service at a rate of 10.31 Gbit/s 10GE WAN: Ethernet service at a rate of 9.95 Gbit/s STM-64/OC-192: SDH/SONET service at a rate of 9.95 Gbit/s OTU2: OTN service at a rate of 10.71 Gbit/s OTU2e: OTN service at a rate of 11.1 Gbit/s FC1200: SAN service at a rate of 10.51 Gbit/s FC800: SAN service at a rate of 8.5 Gbit/s Infiniband 5G: SAN service at a rate of 5 Gbit/s NOTE: The TN15LTX/TN17LTX supports rate auto-negotiation for OTU2 and OTU2e services. |
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OTN function |
NOTE: The functions on ODUflex layer are only supported by TN15LTX/TN17LTX, the TCM and TCM non-intrusive monitoring function on ODU2 layer are only supported by TN15LTX/TN17LTX. |
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Service encryption |
Only supported by TN17LTX. |
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WDM specification |
Supports ITU-T G.694.1-compliant DWDM specifications. |
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Tunable wavelength function |
The board can tune the optical signal output on the WDM side within the range of 80 wavelengths in C-band with the channel spacing of 50 GHz. |
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ESC function |
Supported on the WDM side. The ESC function is supported on the client side of the TN15LTX/TN17LTX board only when OTU2/OTU2e signals are received. NOTE: The TN12LTX/TN11LTX board supports ESC transparent transmission rather than ESC processing on the client side. To implement the ESC function, the TN15LTX/TN17LTX board supports a maximum of six signals on the client side. |
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PRBS test function |
Supports the PRBS function on the client and WDM sides. NOTE: The PRBS function on the client side is supported only when the client-side service type is STM-64/OC-192/OTU2/OTU2e. |
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LPT function |
The board supports the LPT function only when the client-side service type is 10GE LAN. |
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FEC coding |
When OTU2/OTU2e services are provisioned, the client-side TX port supports FEC coding that is compliant with ITU-T G.709 and the client-side RX port does not support FEC decoding. TN15LTX/TN17LTX: When OTU2/OTU2e services are provisioned, the board supports FEC and AFEC.
TN11LTX supports HFEC and SDFEC. TN12LTX supports HFEC and SDFEC. TN15LTX/TN17LTX supports SDFEC2. NOTE: Boards that use different FEC modes cannot interconnect with each other. |
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Alarms and performance events monitoring |
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Regeneration board |
The WDM-side signals of an LTX board can be regenerated using the LTX, NS4, N401,N402, U401 board of the same type. For example,
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ALS function |
Supports the ALS function on the client side when client services are non-OTN services. |
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Test frame |
TN11LTX/TN12LTX: Not supported TN15LTX/TN17LTX: Supports the test frame function when the board receives 10GE LAN services and the port mapping is MAC Transparent Mapping(10.7G) on its client side. |
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Latency measurement |
The TN12LTX/TN15LTX/TN17LTX board support latency measurement. The bidirectional latency at the ODUk layer between two OTU boards supporting the latency measurement function can be measured, and the latency data is displayed on the NMS. NOTE: When the client service is OTU2/OTU2e, the board does not support latency measurement. The latency measurement function can be configured only on one port at a time. |
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IEEE 1588v2 |
Not supported |
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Physical clock |
When the board receives 10GE LAN services and the port mapping is Bit Transparent Mapping (11.1 G) on its client side, the board can support synchronous Ethernet transparent transmission instead of synchronous Ethernet processing. |
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Optical-layer ASON |
Supported |
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Electrical-layer ASON |
Not supported |
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Protection scheme |
NOTE: When the board receives FC services, the client 1+1 protection is not recommended. |
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Ethernet service mapping mode |
TN11LTX/TN12LTX: Bit Transparent Mapping (11.1G) TN15LTX/TN17LTX: Bit Transparent Mapping (11.1G) and MAC Transparent Mapping(10.7G) |
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Loopback |
Client side |
Inloop |
Supported |
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Outloop |
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WDM side |
Inloop |
Supported |
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