Abstract: Dense wavelength division multiplexing within a 1310 nm band is accomplished over a single mode fiber. Carrier wavelengths are selected from within two windows, a low subband and/or a high subband, on either side of a guardband. The guardband includes the zero dispersion wavelength .lambda..sub.0 of a single-mode fiber in the optical communication link and separates low subband and high subband within the 1310 nm band. Dispersion compensation is provided for carrier signals in each dense WDM channel in the low and high subbands.

Abstract: Disclosed are a system and method for processing telephone calls for special services, such as emergency service calls. One or more answering station units may receive calls through a telephone network. The number of the calling station is automatically identified and used to seek calling station location information in a computer memory forming part of the answering station unit. The call is then conferenced with an agency station associated with the services needed, and the location information is dispatched to the agency station. Each service answering station unit is a stand-alone unit.