A catalyst composition that is the combination of or the reaction product of ingredients comprising an iron-containing compound, a silyl phosphonate, and an organoaluminum compound. When a C1 codeword of the data block is found to contain more than a threshold number of errors, a selected number w of distinguishable symbol values is associated with at least one C1 codeword of the block. The exact location is not critical as long as the mark does not make physical contact with the terminal. Preferably SMD leads are formed on the shield plates. The predetermined number of steering directions is equal to or greater than the number of microphones in the microphone array. In said network the ingress LER is arranged to transmit, in use, a path message for setting up a bidirectional label switched path from the ingress LER to the egress LER via at least one LSR in response for a request for such an LSP.