Method for establishing a telecommunication connection in a telecommunication system and telecommunication system

Abstract

In a telecommunication system comprising multiple switching nodes ( 10, 20, 30 ) having a respective local server (C 1, C 2, C 3 ) and associated terminals (D 1, D 2, D 3, D 4 ) located within a network and a central DSS server (DSS) for controlling the telecommunication system by using a general switching protocol, the terminals (D 1, D 2, D 3, D 4 ) of a switching node ( 10, 20, 30 ) are controlled by the local server (C 1, C 2, C 3 ) under a local protocol comprising control commands for node-internal call pickup. The pickup of a call directed from a third terminal (D 4 ) to a first terminal (D 3 ) assigned to a first switching node ( 10 ) through a second terminal (D 1 ) assigned to another, second switching node ( 20 ) occurs across nodes by using the general switching protocol through transferring the control commands provided in the local protocol for call pickup to the general switching protocol and providing them across nodes through the central DSS server (DSS to the multiple switching nodes ( 10, 20, 30 ) located within the network, and converting the registration of a terminal (D 1, D 2, D 3, D 4 ) for call pickup provided in the local protocol to the general switching protocol and forwarding it to the central DSS server.

1 . A method for establishing a telecommunication connection in a telecommunication system having a network and multiple switching nodes with a respective local server and associated terminals located within the network as well as a central DSS server for controlling the telecommunication system by using a general switching protocol, wherein the subscriber terminals of a switching node are controlled by the local server under a local protocol having control commands for node-internal call pickup between terminals registered inside the switching node for call pickup, and wherein the telecommunication connection can be established by a call pickup through a second terminal of a call directed from a third terminal to a first terminal, comprising:
 assigning the first terminal to a first switching node and assigning the second terminal to another, second switching node, and directing the pickup of the call by the third terminal to the first terminal occurs through the second terminal across nodes by using the general switching protocol, wherein the control commands provided in the local protocol for call pickup are transferred to the general switching protocol and provided across nodes to switching nodes located inside the network by the central DSS server, and wherein the registration of a terminal provided in the local protocol for call pickup is transferred into the general switching protocol and forwarded to the central DSS server.   
     
     
         2 . The method as in  claim 1 , further comprising the local server checking during the registration of the first terminal for a call pickup by the second terminal to see whether the second terminal is assigned to the same switching node, and if this is not the case registering the second terminal at the central DSS server using the general switching protocol. 
     
     
         3 . The method as in  claim 2 , further comprising capturing by the central server a call directed from the third terminal to the first terminal and when the first terminal is registered for a call pickup by the second terminal, and transmitting a respective message from the central server to the local server of the switching node of the second terminal and signaling the second terminal. 
     
     
         4 . The method as in  claim 2  further comprising registering multiple terminals as a call pickup group at the central server with one single registration as a second terminal for picking up a call directed from a third terminal to a first terminal. 
     
     
         5 . The method as in  claim 2  further comprising registering at the central server the second terminal with one single registration for picking up calls directed to multiple first terminals. 
     
     
         6 . The method as in  claim 1  wherein CSTA is the general switching protocol, and SIP or a comparable protocol is the local switching protocol, further comprising activating “CSTA: SetLampMode” at the second terminal by the central DSS server (DSS) based on “CSTA: Delivered Events” when a call is directed from a third terminal to a first terminal, signaling for call pickup through a second terminal and the activating occurs via CSTA across nodes to the central DSS server. 
     
     
         7 . The method as in  claim 6 , wherein the second terminal is a SIP endpoint and the call directed from the third terminal to a first terminal is signaled at the second terminal using “SIP: Notify” and is picked up using “SIP: Invite”. 
     
     
         8 . A non-transitory computer readable storage media containing instructions that are executable by at least one of a server and a terminal in a communications system having a network and multiple switching nodes with a respective local server and associated terminals located within the network as well as a central DS S server for controlling the telecommunication system by using a general switching protocol, wherein the subscriber terminals of a switching node are controlled by the local server under a local protocol having control commands for node-internal call pickup between terminals registered inside the switching node for call pickup, and wherein the telecommunication connection can be established by a call pickup through a second terminal of a call directed from a third terminal to a first terminal which when implemented result in the server or terminal performing a method comprising:
 assigning the first terminal to a first switching node and assigning the second terminal to another, second switching node, and directing the pickup of the call by the third terminal to the first terminal occurs through the second terminal across nodes by using the general switching protocol,   wherein the control commands provided in the local protocol for call pickup are transferred to the general switching protocol and provided across nodes to switching nodes located inside the network by the central DSS server, and   wherein the registration of a terminal provided in the local protocol for call pickup is transferred into the general switching protocol and forwarded to the central DSS server.   
     
     
         9 . A telecommunication system comprising a network and multiple switching nodes, each switching node having a respective local server and associated terminals arranged in the network, and
 a central DSS server for controlling the telecommunication system using a general switching protocol,   wherein the terminals of a switching node are controlled by the local server using a local protocol, comprising control commands for node-internal call pickup between terminals registered within the switching node for call pickup, wherein a telecommunication connection can be established through pickup of a call directed from a third terminal to a first terminal by a second terminal,   the central DSS server and the multiple switching nodes being located within the network and are provided to transfer the control commands provided in a local protocol for picking up calls in the general switching protocol and providing them to the multiple switching nodes located across nodes within the network through the central DSS server,   wherein registration of a terminal provided in the local protocol for call pickup is transferred into the general switching protocol and forwarded to the central DSS server,   wherein a telecommunication connection can be signaled to a second terminal assigned to another, second switching node through picking up the call directed from the third terminal to a first terminal assigned to a first switching node and can be established,   wherein the telecommunication system is configured for carrying out the method comprising:   assigning the first terminal to a first switching node and assigning the second terminal to another, second switching node, and   directing the pickup of the call by the third terminal to the first terminal occurs through the second terminal across nodes by using the general switching protocol,   wherein the control commands provided in the local protocol for call pickup are transferred to the general switching protocol and provided across nodes to switching nodes located inside the network by the central DSS server, and   wherein the registration of a terminal provided in the local protocol for call pickup is transferred into the general switching protocol and forwarded to the central DSS server.