[Serusers] call transfer process

[Iqbal]

Hi

If I have a inbound call frompstn which hits SER, and then the call is 
passed to asterisk, the receiver then decides to transfer the call, can 
this be controlled within asterisk/ser, without the PSTN gateway being 
involved, I was thiking that although REFER messages are sent, couldnt 
SER take care of this and just transfer the call to a new sip contact. 
The problem I have got is that I have a upstream gateway which doesnt 
support REFER :-)

Iqbal