| 摘要 |
The invention relates to a method to activate the devices (ECD) for echo suppression in communication links, which are established via at least two networks that can be connected to each other by means of gateways, thereby enabling the terminals in said networks to be connected to each other. Devices (ECD) for echo suppression are provided in the network nodes. If necessary, said nodes can be requested and included in the established links on the basis of predetermined criteria in order to suppress disturbing echo signals. In the switching nodes (GW) of a network (TNA), which have trunk groups leading to other networks (TNB, TNC), certain trunk groups coming in from another network (TNB, TNC) and/or going out to another network (TNB, TNC) are identified by an ecm characteristic. When switching occurs via such a trunk group, the existing devices (ECD) for echo suppression are made available for said connection depending on the ecm characteristic whenever a request for echo suppression has been received in the network (TNA). A network provider can then simply authorize connections coming in from other networks or going out to other networks by identification with the above-mentioned characteristic, he or she can use the devices (ECD) for echo suppression available in his or her network or can prevent their use. |
