Two data centers located in the vicinity are connected using a synchronous transfer copy function, and one of the data centers is coupled with a third data center disposed at a remote location by an asynchronous remote copying function. The module includes a first edge for contacting a first of the opposed walls and a second edge for contacting a second of the opposed walls. In one embodiment, the values may be determined using the frequency of the output signal of the microelectromechanical resonator, which depends on the operating temperature of the microelectromechanical resonator andor manufacturing variations of the microelectromechanical resonator. When reading from at least one output port of the PLD, selectively reading from a cache external to the PLD or a memory of the PLD according to a state of cache coherency. The invention allows the efficient, secure and correct provision of QoS in integrated voice and data networks.