A progressive suspension device for the rear wheel of a motorcycle, includes a swinging fork that has a central section to which one or two arms carrying a wheel are connected. For example, in certain embodiments, compensation circuitry is used to compensate for non-idealities present in the patch clamp system. In the method, by selecting a code where data dispersion is the lowest according to the characteristic of key data to be coded, redundancy of data to be coded increases such that coding efficiency increases. The present method queries a profile database and will connect invitees to a conference based on the directory number associated with the call-log.