Appeal No. 2007-1287
Application No. 10/161,274
3. Beine teaches a system for managing signal power levels in an optical
network. (See Abstract).
4. Beine teaches that each network element contains a wavelength management
unit. (Col. 23, ll. 27-30).
5. The wavelength information tracked by the wavelength management unit
includes the number and type of wavelengths (channels) that are included in
the input signal received. This information is communicated to elements
within the network element. (Beine col. 23, ll. 34-37).
6. These wavelength management units also signal the peer wavelength
management elements with changes in wavelength status. (i.e. the network
elements communicate the wavelength status amongst each other). (Beine
col. 23, ll. 46-48).
7. The wavelength status signaling among units is to notify network elements
of a loss of signal at a destination, or the source has failed, or has been
turned off. (Beine col. 23, ll. 53-55).
8. The wavelength manager is responsible for signaling when wavelengths are
added or dropped. (Beine col. 23, ll. 57-58).
9. The power output or attenuation of the variable output attenuators (VOA) is
adjusted based in part upon the number of channels of information. (Beine
col. 23, ll. 14-19).
10. One of the triggering events to adjust the output level of the VOA is a
sudden change in input power to the VOA. This triggers open loop control
until updated information about the number of channels is available.
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