Thanks for your swift reply, Daniel. I would also like to thank you again for the great training last week. My main question was: Why does forward() not take dynamic parameters? Should it not do so (in the future) to be in line with other functions? It was not difficult to work around, but I think it would be more logical if the function could use dynamic parameters like all the other functions I've used can do. With kind regards, Pan ----- Original Message ----- From: Daniel-Constantin Mierla To: Pan B. Christensen Cc: kamailio Sent: Friday, December 03, 2010 11:14 AM Subject: Re: [SR-Users] using forward() with variables On 12/2/10 4:57 PM, Pan wrote: Hello, We are running Kamailio 1.5. I'm trying to use the forward() function with a variable like this: forward($shv(voip1-edge1)); That fails to parse. I then tried this, which I thought would fail: forward("$shv(voip1-edge1)"); That parsed correctly, but it then failed to resolve the domain '$shv(voip1-edge1)' as expected. Why can this function not use variables? I tried to make a workaround by doing this: $du=$ru; $dd=$shv(voip1-edge1); forward(); That also failed. Why is $du writable but $dd is not? I then made a fourth attempt, which seems to work: $du="sip:" + $shv(voip1-edge1); forward(); indeed, the last version is the one that works. forward() does not take dynamic parameters, only static string values. $dd is not writable because is just part of $du which you can set like you did. $du refers to outbound proxy address (destination uri) and there matters only host, port and transport, all the other attributes in $du have no relevance. Cheers, Daniel -- Daniel-Constantin Mierla Kamailio (OpenSER) Advanced Training Jan 24-26, 2011, Irvine, CA, USA http://www.asipto.com