Four-Channel MultiplexerDemultiplexer Cards

Four-Channel Multiplexer/Demultiplexer Cards

The four-channel multiplexer/demultiplexer card (4MD-xx.x) provides add/drop access to four 100 GHzspaced ITU-T wavelength channels. Channels are multiplexed and demultiplexed using a passive cascade of interferential filters.

Each of the four optical client input ports on the 4MD-xx.x is equipped with an automatic VOA. The maximum insertion loss for each input channel, assuming the minimum VOA attenuation, is 3.6 dB on input and 3.2 dB on output. ITU-T wavelength channels are accessed on the 4MD-xx.x card using eight LC-PC-II connectors on the front faceplate. The 4MD-xx.xx card is a single-slotted interface card. It can be inserted in the ONS 15454 shelf assembly Slots 16 or 1217. Figure 9-15 shows the faceplate layout of the 4MD-xx.x card.

Figure 9-15. The 4MD-xx.x Card Faceplate Diagram

The 4MD-xx.xx adds/drops four adjacent 100 Ghzspaced ITU-T wavelength channels. It is used in concert with the four-channel banded OADM (covered in the next section). Eight discreet product numbers are associated with the 4MD-xx.xx interface card, covering the entire 32-channel MSTP C-band spectrum. Table 9-3 summarizes the product numbers and wavelength assignments for each 4MD-xx.x interface.

Table 9-3. 4MD-xx.x Product Numbers

4-Channel Multiplexer/Demultiplexer	ITU-T Wavelength Channels
4MD-30.3	1530.3, 1531.2, 1531.9, and 1532.6
4MD-34.2	1534.2, 1535.0, 1535.8, and 1536.6
4MD-38.1	1538.1, 1538.9, 1539.7, and 1540.5
4MD-42.1	1542.1, 1542.9, 1543.7, and 1544.5
4MD-46.1	1546.1, 1546.9, 1547.7, and 1548.5
4MD-50.1	1550.1, 1550.9, 1551.7, and 1552.5
4MD-54.1	1554.1, 1554.9, 1555.7, and 1556.5
4MD-58.1	1558.1, 1558.9, 1559.7, and 1560.6