Functions and Features

The MR2B is applied to the DWDM system. The channel spacing is 0.8 nm. The MR2B supports the add/drop multiplexing function between any two adjacent wavelengths.

Table 1 provides the functions and features of the MR2B.

Table 1 Functions and features of the MR2B

Function and Feature	MR2B
Basic functions	Adds/Drops any two adjacent standard wavelengths defined in ITU-T G.692 (DWDM). The signals are transparently transmitted and the operating wavelength ranges from 1535.82 nm to 1560.61 nm.
OTM function	One MR2B board can work as a two-channel add/drop OTM station, as shown in Figure 1. Two MR2B boards can be cascaded to work as a four-channel add/drop OTM station, as shown in Figure 2.
OADM function	Works as a two-channel add/drop OADM station when working with the LWX. For details, see Figure 3.
Central wavelength	Supports the standard wavelengths defined in ITU-T Recommendations. The channel spacing is 100 GHz.

Figure 1 One MR2B board working as a two-channel add/drop OTM station

Figure 2 Two MR2B boards being cascaded to work as a four-channel add/drop OTM station

Figure 3 MR2B and LWX working as a two-channel add/drop OADM station

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