An East-West separable ROADM particularly usable as a programmable N\xd7M optical adddrop multiplexer with an efficient pass through of optical channels in a multi-wavelength communication system. In some implementations, a method includes remotely receiving information associated with heterogeneous assets in an enterprise network. The MS-SAR can also operate in an egress mode so that it receives data from either a packet-based or a cell-based switch fabric and outputs that data in packet andor cell format. Finally, an aqueous phase containing methanol is discharged and the methanol-depleted hydrocarbon phase is recycled to distillation column as reflux. The timing error detector generates the timing error sequence signal according to the first sequence signal and one of the equalized sequence signal and the output sequence signal.