Pr‑ SWCS PC call server is a Windows service that USES the Praesideo open interface to connect to one or more Praesideo network controllers over TCP/IP. It can be used in conjunction with one or more client applications to handle all operational requests, such as PC call station clients and PC telephony interface clients. Pr-s SWCS PC call server is configured by configuring the client through a PC call server configuration running on the same computer. Basic function configuration and control PRS ‑ SWCS PC call server will be able to connect to the client can provide the following work: identity, calling, background music source and volume control, confirmation and reset the emergency control mode, the time synchronization, and permit, etc. It works on Windows XP, Vista and Windows 7. By configuring the client through prs-swcs PC call server, the user can monitor and set up the connection status of the connected network controller. When multiple network controllers are connected, the user can configure an audio connection between the network controllers to emit calls from one Praesideo network to another Praesideo network. The configuration data for each connected Praesideo subsystem can be retrieved from the network controller and used to configure the prs-swcs PC call server. Multiple views of the system can be configured to contain background images of regions and regional group locations, and do not change with the client user. In addition, multiple predefined calls can be configured for different users and accessed through one or more PRS‑CSC PC call-station clients. These predefined calls may contain information such as priority, region, tone, information, and live voice. When all Praesideo systems are connected to the PRS‑SWCS PC call server, the area can be part of different Praesideo systems. The ‑ PRS SWCS PC call server allows the user to control the backview music source and volume in the configured area, and provides the client with feedback on the actual volume. The license PRS‑SWCS PC call server USES a USB key lock to identify whether the system has all the purchased licenses. This key lock is provided with the PRS‑SWCS PC call server. The ‑ PRS SWCS PC call server has a license to use a network controller. For other network controllers connected to the same PRS‑SWCS PC call server, their licenses are provided in the form of a prs-swcsl PC call server NCO license. Applications such as PRS‑CSC PC call-station clients also require licenses. No matter how many clients (operator panels) are connected, only one application license is required. Attachment 1 prs-swcs PC call server license (including license for a network controller). USB key lock 1 PRS ‑ ‑ SW Praesideo software CD ordering information PRS SWCS PC call server based on Windows PC call server license, for hosting multiple PC call station on the TCP/IP network interface to the client, the client or phone support has multiple network controller system, contains the license for a network control device. The purchase order number prs-swcs prs-swcsl PC call server NCO license is used to extend the PC call server to allow it to add an additional network controller license, which will be used in conjunction with the Praesideo PC call server. Order number PRS ‑ ‑ SWCSL PRS SWCSL ‑ E electronic PC call server NCO license code used to extend an additional + 1 PC call server to a network controller license, will be used with Praesideo PC call server. Order number PRS - SWCSL ‑ - E PRS CSC PC calling station to client based on PC programmable touch the calling station or the mouse to control the user interface (with the overview area selection and status indication) license, will be used with Praesideo PC call server. Order number PRS - CSC PRS - CSC - calling station E PC client electronic code for PC based programmable touch or school official cites use the mouse to control the calling station user interface (with the overview area selection and status indication) license, will cooperate with Praesideo PC call server, electronic code to use. The subscription prs-csc-e PRS‑TIC PC telephone interface client is licensed for pc-based telephone interfaces and is used in conjunction with Praesideo PC call servers that call Praesideo through fixed telephones, mobile phones or VoIP. Order number PRS - TIC PRS - TIC - E client PC telephone interface electronic code license for telephone interface based on PC, and through the fixed telephone, mobile phone or soft phone (VoIP) call Praesideo Praesideo PC call server. Order number PRS - TIC - E