The PID feature is implemented by using the ELQX and PTQX cards or the ENQ2 and NPO2 cards.
Implementation principles of the PID feature are described as follows:
- The ELQX and PTQX cards are used.
- An ELQX card converts up to four XGETH, STM-64, OC-192, or OTU2 signals to 4 OTU2 or OTU2e electrical signals, or converts the 4 ODU2 or ODU2e signals or 16 ODU1 signals that are groomed through the cross-connect card to 4 OTU2 or OTU2e electrical
signals. Meanwhile, the card implements the reverse process.
Figure 1 shows the ELQX cards that are used in a WDM system.
- A PTQX card maps up to four XGETH, STM-64, OC-192, or OTU2 signals to 4 OTU2 or OTU2e signals, or maps 4 ODU2 signals or 16 ODU1 signals that are groomed through the cross-connect card to 4 OTU2 or OTU2e signals. At the same time, the PTQX card receives 8 OTU2 or OTU2e signals from the ELQX card, which are groomed through the backplane, integrates the 12 OTU2 or OTU2e signals to one optical signal, and then transmits the optical signal. Meanwhile, the card implements the reverse process. Figure 1 shows the PTQX cards that are used in a WDM system.
- An ELQX card converts up to four XGETH, STM-64, OC-192, or OTU2 signals to 4 OTU2 or OTU2e electrical signals, or converts the 4 ODU2 or ODU2e signals or 16 ODU1 signals that are groomed through the cross-connect card to 4 OTU2 or OTU2e electrical
signals. Meanwhile, the card implements the reverse process.
- The ENQ2(N) and NPO2(N/E) boards are used.
- An ENQ2(N) board implements the conversion between the 32 ODU0 signals, 16 ODU1 signals, or 4 ODU2 signals that are groomed through the cross-connect board and 4 OTU2 optical signals. An ENQ2(N) board also implements the conversion between 4 ODU2e signals and 4 OTU2e optical signals. In addition, an ENQ2(N) board can transmit a mixture of ODU0, ODU1, and ODU2 or ODU2e signals. After conversion, the four 10 Gbit/s OTU2 or OTU2e signals are groomed through the backplane and transmitted to the NPO2(N/E) board. Meanwhile, the board implements the reverse process. Figure 2 shows the ENQ2(N) boards that are used in a WDM system.
- An NPO2(N/E) board implements the conversion between the 64 ODU0 signals, 32 ODU1 signals, or 8 ODU2 signals and 8 OTU2 optical signals. An NPO2(N/E) board also implements the conversion between 8 ODU2e signals and 8 OTU2e optical signals. In addition, an NPO2(N/E) board can transmit a mixture of ODU0, ODU1, and ODU2 or ODU2e signals. At the same time, the NPO2(N/E) board receives the four OTU2 or OTU2e signals from the ENQ2(N) board, which are groomed through the backplane, integrates the 12 OTU2 or OTU2e signals into one optical signal, and then transmits the optical signal. Meanwhile, the board implements the reverse process. Figure 2 shows the NPO2(N/E) boards that are used in a WDM system.
- The NPO2E, ENQ2N and NPO2N boards are used.
- An NPO2E board implements the conversion between the 64 ODU0 signals, 32 ODU1 signals, or 8 ODU2 signals and 8 OTU2 optical signals. An NPO2E board also implements the conversion between 8 ODU2e signals and 8 OTU2e optical signals, and can also receive 4 x OTU2/OTU2e signals from an ENQ2N board and 8 x OTU2/OTU2e signals from an NPO2N board. In this manner, an NPO2E board can integrate 16 or 20 channels. In addition, an NPO2E board can transmit a mixture of ODU0, ODU1, and ODU2 or ODU2e signals. Meanwhile, the board implements the reverse process. Figure 3 shows the NPO2E boards that are used in a WDM system.
- An ENQ2N board implements the conversion between the 32 ODU0 signals, 16 ODU1 signals, or 4 ODU2 signals that are groomed through the cross-connect board and 4 OTU2 optical signals. An ENQ2N board also implements the conversion between 4 ODU2e signals and 4 OTU2e optical signals. In addition, an ENQ2N board can transmit a mixture of ODU0, ODU1, and ODU2 or ODU2e signals. After conversion, the four 10 Gbit/s OTU2 or OTU2e signals are groomed through the backplane and transmitted to the NPO2E board. Meanwhile, the board implements the reverse process. Figure 3 shows the ENQ2N boards that are used in a WDM system.
- An NPO2N board implements the conversion between the 64 ODU0 signals, 32 ODU1 signals, or 8 ODU2 signals and 8 OTU2 optical signals. An NPO2N board also implements the conversion between 8 ODU2e signals and 8 OTU2e optical signals. In addition, an NPO2N board can transmit a mixture of ODU0, ODU1, and ODU2 or ODU2e signals. Meanwhile, the board implements the reverse process. Figure 3 shows the NPO2N boards that are used in a WDM system.
