See Also
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4/8/2010
Connection Manager supports the following scenarios for connecting to a corporate network or the Internet:
- Dialup connection using RAS
Enables users to connect to the Internet or a corporate network by establishing a circuit-switched data (CSD) connection using one of the RAS numbers available. This scenario is most feasible for users who can use one of the local RAS numbers to connect to a corporate network.
If the user tries to connect from a location where there are no local RAS numbers available to connect to the Internet but there are local RAS numbers to connect to a corporate network, it is most cost effective to establish a proxy connection to the Internet using the corporate RAS connection.
If a high-priority connection is connected to the corporate network, a lower-priority connection request to the Internet recycles the same corporate connection and uses the proxy to establish an Internet connection.
- Connection through a virtual private network (VPN)
Enables devices to tunnel through the Internet to the corporate network using their own Internet service provider (ISP) to establish an Internet connection. This scenario is most feasible for users who are dialing in from a location where no local RAS numbers are available to connect to a corporate network.
Note:If your VPN network IP address class belongs to the GPRS IP address class, the VPN network cannot be reached when both GPRS and VPN connections are active (connected). - Wireless local area network (LAN) connection
Enables users to connect to a corporate network or to the Internet through a wireless network connection. Requires a wireless network adapter for the Windows Mobile device.
- Cellular packet connection, for example, General Packet Radio
Services (GPRS) on Global System for Mobile communication (GSM)
networks, 1xRTT on Code-Division Multiple Access (CDMA) networks.
Enables users to connect to the Internet through a cellular network connection. Unlike CSD connections, these packet connections have no connection timeouts and also are not disconnected when enters idle mode. Once a cellular packet connection is established, it remains connected until either the user manually disconnects the connection or the device loses network coverage.
The user is not required to configure a specific connection. When an application requests a connection, Connection Manager selects the best route from the available options, based on cost or bandwidth.
After the user activates a packet data connection such as GPRS or 1xRTT, if a voice call occurs, the data session is suspended for the duration of the voice call. During this state, the device caches the data session and maintains the same IP address, but actual data cannot be sent or received. Once the voice call ends, the session is immediately reactivated with the same IP address. The user does not have to reactivate the session. The packet data connection is suspended only in the case of a voice call, but not if the user makes a CSD connection. In that case, the packet data connection is terminated.