Abstract: A method of retrieving a transport format indicator (TFIi) from a calculated transport format combination (CTFC), which calculated transport format combination is computed by means of the following relation formula (I) where: —Lj is the number of available transport formats for a transport channel j (TrCHj); —Pi is a weight associated with transport channel i (TrCHi); and—TFIi is the transport format indicator of transport channel i, the value TFIi being equal to a whole part of a division of an integer (Fi) by weight Pi, the integer Fi being a function of the CTFC value, wherein the whole part is determined (90) by repeatedly decrementing the integer Fi by the weight Pi.

Abstract: In a module-based software architecture, the impact of module replacement or removal is minimized by using an indirect calling technique. Where interactions between modules (M0-M4) are considered in terms of a client/server relationship, a server module (e.g. M3) is called by a client module (e.g. M1) using the server module's reference (&M3). The reference (&M3) of the module to be called (M3) is supplied as an input to the client module (M1). Each module is adapted to recognize as a null reference an input parameter taking a predetermined value. When the module to be called is identified by a null reference no call is made to that module.