[Serusers] problem with uri parameters?

[Brett N]

All,
I'm having a problem that I think has to do with Tel URIs.

Sometimes my provider sends me calls that look like this:
INVITE
sip:7135551637;rn=7135550099;npdi=yes at 10.25.11.13:5060;dtg=HSTNSIPORIG02;user=phone

But sometimes I get calls that don't have NPDI set so I look it up and
stick it on the URI (using URI add_param). The result looks like this:


INVITE sip:7135551637 at 10.25.11.13;npdi=yes at 10.25.11.13:5060;rn=7135550099

They are complaining that all the optional parameters need to be located
before the "@" sign. Now at first I jumped on that and said it was wrong,
but in RFC 3261 it says:
=== SNIP ===
19.1.6 Relating SIP URIs and tel URLs

   When a tel URL (RFC 2806 [9]) is converted to a SIP or SIPS URI, the
   entire telephone-subscriber portion of the tel URL, including any
   parameters, is placed into the userinfo part of the SIP or SIPS URI.

   Thus, tel:+358-555-1234567;postd=pp22 becomes

      sip:+358-555-1234567;postd=pp22 at foo.com;user=phone

   or
      sips:+358-555-1234567;postd=pp22 at foo.com;user=phone

   not
      sip:+358-555-1234567 at foo.com;postd=pp22;user=phone

   or

      sips:+358-555-1234567 at foo.com;postd=pp22;user=phone
==========


So maybe these parameters DO in fact belong before the "@" sign..

So three questions..
1. Do they belong before the "@" sign, what do you think?
2. how do I get ser to add these parameters before the "@" sign
3. Can ser interpret parameters before the "@" sign?


Thanks!