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This setting is used to automatically connect:

• the Client client to the Server server without having to re-enter the Server server name, username and password when starting the app;
• the Client to Servers belonging client to servers that belong to different domains (see Cross-System client);
• the Client client to the nodes of the FailOver system (see see Configuring Failover VMS).

If you connect automatically, the Servers servers specified in the Automatic connection parameters group will be are used first. If these Servers servers are unavailable, the system will try tries to connect to the Servers servers from the Preferred servers parameters group following the set order (see Preferred servers).

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Configuration of Automatic connection

To configure automatic connection, do the following:

1. Select the Go to the Settings tab → the Options tab (1) → Automatic connection (2).
   
2. From the drop-down list (3), select the connection protocol.
   Description of the protocol and recommendations for selection are given in the table.
   

   Protocol	Description
   TCP	This protocol is more reliable, but has a busy connection. We recommend selecting it for Servers with a small number of cameras
   UDP unicast	UDP protocol has a higher data transmission speed, but it is less reliable. The unicast scheme is used to transmit data to a single recipient. You must select this protocol for a Server with a large number of cameras and which has several Clients working with it
   UDP multicast	The multicast scheme is used to transmit data to a group of recipients. This protocol is best suited for a Server with a large number of cameras and which has many Clients working with it. Attention! This protocol must be supported by all network elements, including switches

   The connection protocol of the Clients to the Server determines the choice either in favor of connection reliability or in favor of data transmission speed. You must select the connection protocol for each Sever of the domain. All Clients connected to the Server will receive video streams via this protocol.
3. For automatic authorization when connecting to Servers, enter the username and password (4). If you leave these fields blank, authorization will be performed manually when you start the Client.
   

   Note
   title Attention!
   Cross-System Client connects to all Servers using a single username-password pair that must be created in each domain (see Cross-System client).

4. In the Connection timeout field (5), specify the wait period for a successful connection before considering the attempt unsuccessful. The default value is 60 seconds, the maximum value is 300 seconds (5 minutes). If you use this setting, an automatic connection attempt will occur immediately. If connection fails, the Server will wait for the period of time specified by the user (timeout) and repeat the connection attempt.
5. Specify the maximum number of automatic connection attempts after the specified timeout (6).
6. Specify the Servers to which you want to connect. For each Server, do the following:
   
   
   1. Select a Server from the list or enter the Server IP address (7).
   2. Specify the port for connecting to the Server (8).
      

      Info
      title Note
      If you leave the Port field blank, the standard port 20109 will be used for connection.

   3. Click the Add button (9).
      

      Info
      title Note
      If you use Cross-System Client, you can connect to only one Server of each domain (see Cross-System client). That is why when you add a Server to the list, all other Servers in that domain become unavailable for selection. To remove a Server from the list, click the  button.

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