The retrofitting of an existing methanol or methanolammonia plant to make acetic acid is disclosed. This system comprises a means for focusing the illuminating beam onto the integrator. The first communication device may output status information included in combination information sent from the first communication device, and update the stored contents of the first storage device such that identification information included in the combination information is stored in the first storage device. The backups are directed to backup devices within the backup cell. The reflective device is coupled to an end of the at least one segment of optical fiber and is adapted to reflect back a portion of the ASE signals.