[Serusers] Using SER with UAs that do not register

Hi SER's, I want to set up a private SIP network over a VPN using SER but some of my UAs are only able to operate in peer to peer mode (ie they cannot register). My proposed network architecture is the following: UA1=192.168.0.4 UA2=192.168.1.4 UA3=192.168.2.4 SER=192.168.0.5 UA1 & UA2 can register with SER but UA3 cannot. I have already set this up and have successfully made calls between UA1 &UA2. How do I set up SER to make calls from either UA1 or UA2 to UA3, or calls from UA3 to either UA1 or UA2? Any help greatly appreciated! thx Mark ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify postmaster(a)lakecommunications.com This footnote also confirms that this email message has been scanned for the presence of computer viruses. www.lakecommunications.com **********************************************************************