In one embodiment, the present invention includes a method for receiving incoming data in a processor and performing a checksum operation on the incoming data in the processor pursuant to a user-level instruction for the checksum operation. The tray may be manufactured from a paper pulp material, such as molded pulp. Preferably, the inhibitor is not a phospholipid. The second clamping part is fixedly connected with the back casing. The system in a preferred embodiment is a computer-telephony integration software application adapted to execute on a CTI processor, which may be coupled to switching equipment at network level in a connection-oriented, switched telephony network or to a switch at call-center level, or both.