Four-Band OADM Filters


The four-band OADM filter (AD-4B-xx.x) provides add/drop access to four bands of ITU-T wavelength channels (four each), covering channels on the 100 GHz or the 50 GHz grid. Each channel band consists of four channels. Thus, two AD-4B-xx.x interface units are available to cover the MSTP 32-channel C-band spectrum. The unit operates bidirectionally, with channels being multiplexed/demultiplexed using a passive cascade of interferential filters. Wavelength add/drop operates along a single East/West path, allowing for asymmetrical channel use.

Table 9-4 summarizes the product numbers and channel assignments for the two AD-4B-xx.x product codes.

Table 9-4. AD-4B-xx.x Wavelength Assignments

OADM Filter

Channel Band

ITU-T Grid

ITU-T Wavelength Assignments

AD-4B-30.3

B30.3

100 GHz

1530.3, 1531.2, 1531.9, and 1532.6

50 GHz

1530.7, 1531.5, 1532.2, and 1533.3

B34.2

100 GHz

1534.2, 1535.0, 1535.8, and 1536.6

50 GHz

1534.6, 1535.4, 1536.2, and 1537.0

B38.1

100 GHz

1538.1, 1538.9, 1539.7, and 1540.5

50 GHz

1538.5, 1539.3, 1540.1, and 1540.9

B42.1

100 GHz

1542.1, 1542.9, 1543.7, and 1544.5

50 GHz

1542.5, 1543.3, 1544.1, and 1544.9

AD-4B-46.1

B46.1

100 GHz

1546.1, 1546.9, 1547.7, and 1548.5

50 GHz

1546.5, 1547.3, 1548.1, and 1548.9

B50.1

100 GHz

1550.1, 1550.9, 1551.7, and 1552.5

50 GHz

1550.5, 1551.3, 1552.1, and 1552. 9

B54.1

100 GHz

1554.1, 1554.9, 1555.7, and 1556.5

50 GHz

1554.5, 1555.3, 1556.1, and 1556.9

B58.1

100 GHz

1558.1, 1558.9, 1559.7, and 1560.6

50 GHz

1558.5, 1559.3, 1560.2, and 1561.0


Each of the four optical band input ports on the AD-4B-xx.x is equipped with an automatic VOA. Express, pass-through ports also use automatic VOAs. The maximum insertion loss for each input channel band, assuming the minimum VOA attenuation, is 3.5 dB on input and 4.5 dB on output. Pass-through insertion loss is 4.8 dB at minimum VOA attenuation. Wavelength channels are accessed on the AD-4B-xx.x card using eight LC-PC-II connectors on the front faceplate. The AD-4B-xx.xx card is a single-slotted interface card. It can be inserted in the ONS 15454 shelf assembly Slots 16 or 1217. Figure 9-16 shows the faceplate layout of the AD-4B-xx.x card.

Figure 9-16. AD-4B-xx.x Card Faceplate Diagram





Building Multiservice Transport Networks
Building Multiservice Transport Networks
ISBN: 1587052202
EAN: 2147483647
Year: 2004
Pages: 140

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