Is there anyway to register a SIP client to Asterisk using the first registration pkt sent by the SIP client?
I normally see the following
SIP client ------register----> Asterisk
SIP client <—401/unauthorised- Asterisk
SIP client -----register-----> Asterisk
SIP client <—200 OK------- Asterisk
This is not a problem per say if there is not much delay in the link between SIP client and Asterisk. But if the link has more delay ( >600ms ), the SIP client is not able to register to the SIP server.