Patent ID: 6301250
Filing Date: 2001-10-09
Classification: H04J,H04L,H04Q

Abstract:
A method of operating an interface device comprising the steps of:receiving telecommunications signals in an interface device for connecting with a plurality of connections, from either a first telecommunications subnetwork (ISDN) operating in a synchronous time-division multiplex mode (ISDN) with a fixed assignment of time slots with transmission channels using a first signaling protocol (SI1) or from a second telecommunications subnetwork (ATM) operating in a statistical multiplex mode (ATM) with transmission capacity assigned to each connection using a second signaling protocol (SA1),performing a conversion between the first signaling protocol and the second signaling protocol in the interface device, wherein during each connection setup the signaling is converted by adapting a number of transmission channels reserved in the first subnetwork (ISDN) for the connection undergoing set up to a transmission capacity assigned to said connection in the second subnetwork (ATM) so that only a capacity required by said capacity reserved in the first subnetwork is occupied in said second subnetwork, andfurther comprising the steps of converting user information based on a pattern fixed during the connection undergoing setup by signalling (SI1, SA1), for transmitting a respective data stream in an original form thereof.