[Serusers] Adding Aliases for inbound PSTN

[Ashutosh kumar]

Hi,

   I want to configure my ser.cfg so as to bind a user john to a DID
1234 from my pstn switch. John is a user in my ser DB and i want to
assign him the phone number 1234, so that whenever my pstn GW forwards
this call for 1234 to SER, SER should forward this call to user
john.Which command do i use ni this case.
	serctl alias add john 1234, OR serctl alias add 1234 john,

beacuse in my case, none of these is working, although i can see the
switch forwarding the call to SER. 
 	How can i use save("aliases") in this scenario? I have used
lookup ("alaises") at appropriate places.


Thanks
Ashutosh