| 摘要 |
The present invention relates to a call-back method for telecommunications and to devices adapted accordingly, wherein a first subscriber with a first communication end device (A) that preferably comprises a SIM-card, indicates to a telecommunication system that he wants to communicate with at least a second subscriber with a second communication end device (B). Connections (10, 11, 2a, 2c) are further established to a backbone (1) through a local gateway (3a) and a destination gateway (3c), wherein said gateways provide for an economical communication. The local gateway (3a) and the destination gateway (3c) are determined so that the current charging rate towards the communication end device (A) of the calling subscriber, or towards the communication end device (B) of the called subscriber, is as reduced as possible. The current charging rates of the gateways (3a, 3b, 3c) are monitored during the communication and, if need be, a communication end device (A) is connected by handover to the backbone (1) through a more economical gateway (3b). |
