Method, device and system for call establishment

A method for call establishment, comprising:

• obtaining a pre-configured binding relationship between a plurality of conference rooms and terminals, and setting correspondences between terminals of the conference rooms according to the binding relationship;
• and
• establishing media communications between a Multiple Control Unit (MCU) and the terminals according to the binding relationship and the correspondences,
• wherein establishing media communications between the MCU and the terminals according to the binding relationship and the correspondences comprises:
• establishing calls between the MCU and called terminals of respective conference rooms;
• establishing calls between the MCU and non-called terminals of respective conference rooms according to the binding relationship, and establishing media communications between the MCU and respective terminals;
• according to the correspondences, forwarding the media communications between the terminals having the correspondences and the MCU.

A device for call establishment, comprising:

• a first obtaining module configured to obtain a pre-configured binding relationship between a plurality of conference rooms and terminals through a register server;
• a first setting module configured to set correspondences between the terminals of calling and called conference rooms according to the binding relationship;
• a first call establishing module configured to establish media communication with a corresponding terminal,
• a notifying module configured to send a notification carrying the correspondences to non-calling terminals of the calling conference room according to the binding relationship, or send a notification carrying the correspondences to the non-calling terminals of the calling conference room via the register server according to the binding relationship;
• and
• a receiving module configured to receive from the calling terminal or the register server, the notification carrying the correspondences between the terminals;
• wherein the first call establishing module is configured to establish a call between each terminal of the calling conference room and a corresponding terminal of the called conference room according to the correspondences carried in the notification received by the receiving module, and establish media communication between each terminal and the corresponding terminal.

A method for call establishment, comprising:

• obtaining a pre-configured binding relationship between a plurality of conference rooms and terminals through a register server;
• setting correspondences between terminals of calling and called conference rooms according to the binding relationship;
• and
• establishing media communications with the terminals having the correspondences,
• wherein establishing media communications with the terminals having the correspondences comprises:
• establishing a call with a corresponding called terminal according to the correspondences;
• according to the correspondences, setting logic sending channels and media sending channels between non-calling terminals of the calling conference room and non-called terminals of the called conference room which have the correspondences in a call link of the established call;
• and
• transmitting the media streams between the calling terminal and the called terminal and those between the non-calling terminals and the non-called terminals having the correspondences, through the logic sending channels and the media sending channels.

A method for call establishment, comprising:

• obtaining a pre-configured binding relationship between a plurality of conference rooms and terminals;
• setting correspondences between terminals of calling and called conference rooms according to the binding relationship;
• and
• establishing media communications with the terminals having the correspondences,
• wherein setting the correspondences between the terminals of the calling and called conference rooms according to the binding relationship comprises:
• obtaining the correspondences between the terminals of the calling and called conference rooms from the register server configured with the binding relationship between the conference rooms and the terminals,
• wherein establishing media communications with the terminals having the correspondences comprises:
• establishing a call link between the calling terminal and corresponding called terminal according to the binding relationship, and setting logic sending channels and media sending channels between the terminals having the correspondences in the call link;
• and
• transmitting the media streams between the terminals having the correspondences through the logic sending channels and the media sending channels.

A device for call establishment, comprising:

• a first obtaining module configured to obtain a pre-configured binding relationship between a plurality of conference rooms and terminals through a register server;
• a first setting module configured to set correspondences between the terminals of calling and called conference rooms according to the binding relationship;
• and
• a first call establishing module configured to establish media communication with a corresponding terminal,
• wherein the first call establishing module comprises:
• a first call establishing unit configured to establish a call with a corresponding called terminal according to the correspondences or a request from the calling terminal;
• a first channel establishing unit configured to set logic sending channels and media sending channels between the terminals having the correspondences in the calling conference room and the terminals having the correspondences in the called conference room in a call link of the established call, according to the correspondences;
• and
• a first communication unit configured to transmit media streams between the terminals having the correspondences, through the logic sending channels and the media sending channels.

A device for call establishment, comprising:

• a first obtaining module configured to obtain a pre-configured binding relationship between a plurality of conference rooms and terminals;
• a first setting module configured to set correspondences between the terminals of calling and called conference rooms according to the binding relationship;
• and
• a first call establishing module configured to establish media communication with a corresponding terminal,
• wherein the first obtaining module is configured to obtain a pre-configured binding relationship between position numbers and IP addresses of the terminals in the conference room;
• and the first setting module is configured to set the correspondences between the IP addresses of the terminals of the calling and called conference rooms according to the position numbers in the binding relationship,
• wherein the first call establishing module comprises:
• a second channel establishing unit configured to establish a call link between the calling terminal and a corresponding called terminal according to the binding relationship, and set logic sending channels and media sending channels between the terminals having the correspondences in the call link;
• and
• a second communication unit configured to transmit media streams between the terminals having the correspondences through the logic sending channels and the media sending channels.