Methods and systems for no-glue pocketed spring unit construction. The method comprises the steps of receiving a prompt, from one of a plurality of service switching points in a predetermined geographic service area, for a service associated with the call, and determining one of a plurality of tandem switches to which the call will be directed based on a probability distribution. The assembly also optionally includes a polarizer, andor a fixed attenuator, andor an optional blocking filter downstream of the polarizing beamsplitter. An advantage of the present invention is its ability to eliminate toxic byproducts.