Types of channel bandwidth supported by OSC boards


In general, OSC boards support the following channel bandwidth: 4.096 Mbit/s, 16.896 Mbit/s, and 155.52 Mbit/s.

Other related questions:
FIU ports available for connection to the OSC board
An OSC board can be connected to the TM or RM port of an FIU board.

Types of supervisory channels supported by NG WDM equipment
The DCC channel bandwidth supported by NG WDM equipment is represented by the number of loadable 64 bytes. The following lists the DCC channels supported by NG WDM equipment and the bandwidth: D1-D3 3 bytes D4-D12 9 bytes GCC0 3 bytes GCC12_9 9 bytes GCC12_18 18 bytes Pilot-tone DCC Irrelevant to byte or bandwidth Note: 1. For the OTU boards whose WDM-side service type is SDH, the DCC channel type is D1-D3. Channels D4-D12 are not supported. 2. SC2/SC1 boards support two DCC channel types: D1-D3 and D4-D12. In normal situations, both DCC channel types can be used to transmit monitoring information. After ASON is enabled, D4-D12 can be used only as physical channels to transmit the ASON protocol. 3. For the OTU board of the OTN frame structure, three channel types are supported: GCC0, GCC12_9, and GCC12_18. For OTN boards with 2.5G rates, GCC0 and GCC12_9 are allocated. For OTN boards with 5G and 10G, GCC0 and GCC12_18 are allocated. The bandwidth provided by GCC0 is 3 bytes, which is the same as the bandwidth of D1-D3. It is the GCC0 byte in the OTUk overhead in the OTN frame structure. The bandwidth provided by GCC12_9 and GCC12_18 are 9 and 18 bytes respectively. They are the GCC1 and GCC2 bytes without various bandwidth in the ODUk overhead in the OTN frame structure. 4. Pilot-tone DCC is special. By coupling RF signals and service signals, pilot-tone DCC uses RF signals to carry monitoring information. Therefore, no byte or bandwidth is involved in pilot-tone DCC.

Whether LMP uses OTN overheads or DCC overheads
LMP stands for Link Management Protocol. For optical-layer ASON services, LMP uses the DCC bytes of the OSC channels. For electrical-layer ASON services, LMP uses OTN overheads.

OSC boards that can work together with the SFIU board
The OSC board that works with the SFIU board must be ST2, because the ST2 board supports either the 1511 nm or 1494 nm pluggable optical module. When the ST2 board works with the SFIU board, the operating wavelength of its RM1/TM1 port is 1511 nm and that of its RM2/TM2 port is 1491 nm. The SFIU board converges these two monitoring signals so that they can be transmitted over one optical fiber, implementing the commissioning-free and compensation-free functions defined in IEEE 1588v2.

WLAN channel bandwidth
WLAN channel bandwidth. The channel bandwidth in HT20 mode is 20 MHz, and the channel bandwidth in HT40 mode is 40 MHz. Two neighboring 20 MHz channels are bundled to form a 40 MHz channel. One channel functions as the main channel, and the other as the auxiliary channel. The main channel sends Beacon packets and data packets, and the auxiliary channel sends other packets. When the HT40 mode is used in the 2.4 GHz frequency band, there is only one non-overlapping channel. Therefore, HT40 is not recommended in the 2.4 GHz frequency band. During channel bundling of two neighboring 20 MHz channels, if the center frequency of the auxiliary 20 MHz channel is lower than that of the main channel, plus is marked; otherwise, minus is marked. For example, 149plus indicates that the 20 MHz channel where the center frequency 149 resides and the 20 MHz channel where the center frequency 153 resides are bundled to form a 40 MHz channel. For 802.11ac, you can also configure 80 MHz and 160 MHz channels.

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