horchata wrote:
>
> Hi all,
>
> Is there a standard way (or some other way) to connect
> two parties using SIP in the following way:
>
> * Person A's phone rings
> * A answers the phone, hears normal alerting tone
> * B's phone starts to ring
> * B picks up the phone and the call is connected
>
> Must this be implemented using an RTP proxy that is
> able to provide A with the alerting tone while B picks
> up the phone, or was this service taken care of when
> SIP was specified?
This is usually called Third Party Call Control; services such as these
while not specified in the base SIP RFC 2543 can be done within the SIP
framework. Jonathan Rosenberg has a I-D on Third party call control --
the URL is, let me see.....here -
http://www.cs.columbia.edu/~hgs/sip/drafts/draft-rosenberg-sip-3pcc-00.txt
> Additional question: can anyone help with choose of a
> SIP stack and/or proxy server? Any experience is
> appreciated.
There are many public SIP proxies that you can use (including one from
Lucent). The URL to these is:
http://www.cs.columbia.edu/sip/servers.html
As far as SIP stacks, Henning has a list of vendors at:
http://www.cs.columbia.edu/sip/implementations.html
Hope that helps.
- vijay
--
Vijay K. Gurbani [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED]
Internet Software Group/Intelligent Network and Messaging Systems
Lucent Technologies/Bell Labs Innovations, 263 Shuman Blvd, Rm 1A-413
Naperville, Illinois 60566 Voice: +1 630 224 0216 Fax: +1 630 713 0184
