Abstract: There is provided a method for centralized screening of a communication session, comprising: receiving, at a server, a request from a caller client terminal, to establish a communication session with a callee client terminal; analyzing, by the server, the request according to a screening set-of-rules; and transmitting, from the server, a screening response to the caller client terminal according to the analysis, wherein the analyzing and the transmitting are performed by the server independently of at least one of real-time status of the callee client terminal and real-time response instructions from the callee client terminal.

Abstract: There is provided a method performed by a server, comprising: detecting a dropping of a bidirectional voice communication on a communication segment between a first client terminal and the server, the communication segment part of the bidirectional voice communication established between the first client terminal and a second client terminal using respective communication segments with the server, the dropping triggered by insufficient resources for maintaining the bidirectional voice communication in a desired quality for the first client terminal, receiving at least one message from the first client terminal, the at least one message including instructions for restoring the bidirectional voice communication, the at least one message received over available resources sufficient for transmission of the at least one message over the affected communication segment; and restoring the bidirectional voice communication according to the received instructions when sufficient resources are available for maintaining t