[Serusers] alias

SER Users: I'm having some problems with aliasing. I think it is from a mis-behaving client, but I would appreciate comments if anybody has some insight! I have a user_id registering as 4695466417, I can call this number from other SIP devices and from my PSTN gateway. I set an alias for this user '233200'. The alias table is updated, and the packet is forwarded correctly to the device at 4695466417. That device is returning a 486 busy. Here is the invite packet: U 216.87.144.205:5060 -> 216.87.145.28:5060 INVITE sip:4695466417@192.168.2.23:5060 SIP/2.0..Max-Forwards: 10..Rec ord-Route: <sip:PPCprotectedClient797115@216.87.144.205:5060>,<sip:233 200@216.87.144.203;branch=0>..Via: SIP/2.0/UDP 216.87.144.205:5060;bra nch=PPCprotectedClient797115,SIP/2.0/UDP 216.87.144.203;branch=z9hG4bK 5819.87aaef61.0,SIP/2.0/UDP 216.87.145.22:5060..From: greg fausak <sip :230057@addaline.com>;tag=247809120..To: <sip:233200@addaline.com>..Co ntact: <sip:230057@216.87.145.22:5060>..Call-ID: 54D527FD-3383-4A70-97 D8-E80324106BF0@216.87.145.22..CSeq: 31104 INVITE..Authorization: Dige st username="230057",realm="addaline.com",nonce="3ec70a8b000000003b186 6260d18b11488734cf3ee902282",response="f517708e3fc30b2feb733dbe2fa7585 0",uri="sip:233200@addaline.com"..Content-Type: application/sdp..User- Agent: Addaline build 1002..Content-Length: 275....v=0..o=230057 37866 6493 378666493 IN IP4 216.87.144.205..s=Addaline..c=IN IP4 216.87.144. 205..t=0 0..m=audio 39258 RTP/AVP 0 3 98 97 101..a=rtpmap:0 pcmu/8000. .a=rtpmap:3 gsm/8000..a=rtpmap:98 iLBC..a=rtpmap:97 speex/8000..a=rtpm ap:101 telephone-event/8000..a=fmtp:101 0-15.. (sorry about the formatting) Here is the response: U 216.87.145.28:5060 -> 216.87.144.205:5060 SIP/2.0 486 Busy Here..From: greg fausak <sip:230057@addaline.com> ;ta g=247809120..To: <sip:233200@addaline.com> ;tag=c0a80217-13c4-3ec70960 -e8d5-51a5..Call-ID: 54D527FD-3383-4A70-97D8-E80324106BF0(a)216.87.145.2 2..CSeq: 31104 INVITE..Via: SIP/2.0/UDP 216.87.144.205:5060 ;branch=PP CprotectedClient797115..Via: SIP/2.0/UDP 216.87.144.203 ;branch=z9hG4b K5819.87aaef61.0..Via: SIP/2.0/UDP 216.87.145.22:5060..User-Agent: FXS _GW (3502a-sip0402.BIN)..Content-Length:0.... If I do an INVITE directly to 4695466417 it works. The only difference in the INVITE packet seems to be the To: <sip:233200@addaline.com> or To: <sip:4695466417@addaline.com>. Is this client misbehaving? Thanks, ---greg