You cannot.
This is how the sip spec works.
Every new invite is a new call and a new trip to the dialplan.

You will probably need to design your code to send the appropriate 484 and be prepared to exit and be called again with the new digits.


On Wed, Nov 4, 2009 at 2:23 AM, Dennis <odermann@googlemail.com> wrote:
is there a way to send something like 484 (or something else), which
does not make it a final answer and keep the call/socket alive?

so we can ask the cirpack for further digits and decide what to do, if
the cirpack does not send any digits.



2009/11/3 Anthony Minessale <anthony.minessale@gmail.com>:
> The patch was it's ability to accept subsequent invites.
> Your problem is that in sip each new attempt to send an invite is another
> call.
>
> 484 is a final response so the call with too few digits is terminated.




--
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale@hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888@conference.freeswitch.org
iax:guest@conference.freeswitch.org/888
googletalk:conf+888@conference.freeswitch.org
pstn:213-799-1400