A system and method of acquiring and processing full elastic waveform data from a vertical-force source comprises providing seismic waves into the earth from the vertical-force source, sensing reflections of the seismic waves at multi-component geophones placed along the surface of the earth, and processing the reflections of the seismic waves to generate full elastic waveform data. Chambers nest within one another to form a stack of chambers for transport or storage. In the packet queue, at the time where the final ATM cell forming a packet is stored in the virtual connection queue, an identifier of the virtual connection is stored. A predetermined value will be transferred to and held at an output Q of a second circuit element triggered by the output Q of the first circuit element, and the predetermined value will be cleared from the output Q of the second circuit element a predetermined time period after being triggered. The connector joins the ends of successive cords utilizing the outwardly projecting shoulder provided on the female socket of one cord in cooperation with a latch member on the male end of the connecting cord to lock the two cords together.