SOAP with Attachment

[Daniel Zhang]

In SOAP with attachment examples, the remote URL is 
"http://domainname/soap/servlet/rpcrouter";. So the SOAP server may have 
method like getAttachment(DataHandler dh, String param1, String 
param2,...) to get data passed from SOAP client.  I wonder if I can use 
"http://domainname/soap/servlet/messagerouter"; as remote URL and pass 
data as attachment to getAttachment(DataHandler dh, String param1, 
String param2,...) sitting at SOAP server?

BTW, what's the difference between rpcrouter and messagerouter? Anyone 
can describe them? TIA.

Daniel