No. Rebex components focus on network protocols, not on connection managment.
To connect using a dial up connection from .NET CF on PocketPC, you can use Connection Manager functions such as ConnMgrEnumDestinations, ConnMgrEstablishConnection and ConnMgrReleaseConnection. Check out MSDN connection manager page for details. There are no classes available for this in .NET CF, but it can be done quite easily using P/Invoke if you have some experience with this. The following blog post covers this in detail and also contains C# source code.
Another solution is using the Smart Device Framework by OpenNETCF.org that contains a wrapper class for the Connection Manager. It is free for any commercial or noncommercial purpose up to the version 1.4. It also includes the source code, so you might either use it as is or as a reference for your own implementation if you prefer.