I wish to set up two SIP to PSTN calls and then connect them similar to Jajah (is this called 3pcc?). The calls would be proxied by OpenSER and the PSTN interconnected handled by a third party provider with PSTN interconnect. To my knowledge, it's not possible to use OpenSER alone to do this. Options include WeSIP (beta software, restrictive licence) or Asterisk (poor implementation of "peer" identification limits usability). Could anyone advise what other alternatives there are? Is it possible to just use OpenSER? What about SEMS? Regards Cameron