When I included a pv transformation in my cfg script to extract the expires value from a Contact I found that it would not work if the Contact string contained spaces. I does not seem to affect registration. $(ct{param.value,expires}) The following patch in 1.3.0 works for me -- --- parser/parse_param.c-orig 2007-12-22 23:23:05.000000000 -0800 +++ parser/parse_param.c 2007-12-22 23:23:38.000000000 -0800 @@ -281,7 +281,7 @@ while(_s->len) { switch(_s->s[0]) { - case ' ': + //case ' ': case '\t': case '\r': case '\n': An example of a message that fails Contact expires transformation -- Session Initiation Protocol Request-Line: REGISTER sip:proxy01.sipphone.com SIP/2.0 Method: REGISTER Resent Packet: False Message Header Via: SIP/2.0/UDP 192.168.1.4:5061;branch=z9hG4bK-1849b3b3 From: Gateway <sip:17476316719@proxy01.sipphone.com>;tag=a0bda46794e0291o1 To: Gateway <sip:1234567@proxy01.sipphone.com> Call-ID: 6d0c06a5-8d11d464(a)192.168.1.4 CSeq: 51635 REGISTER Max-Forwards: 70 Authorization: Digest username="1234567",realm="proxy01.sipphone.com",nonce="476e0e7866cafbf20434684456644a3d2022c85f",uri="sip:proxy01.sipphone.com",algorithm=MD5,response="57d8e4aea67f9bb45ced0394fe54d659" Contact: Gateway <sip:1234567@192.168.1.4:5061>;expires=3600 User-Agent: Linksys/SPA3000-3.1.10(GWd) Content-Length: 0 Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER Supported: x-sipura