[Iptel] Re: [Sipping] New draft on end system communication services
Arjun Roychowdhury <arjunrc@gmail.com> Fri, 18 February 2005 16:55 UTC
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Date: Fri, 18 Feb 2005 08:37:18 -0500
From: Arjun Roychowdhury <arjunrc@gmail.com>
To: Xiaotao Wu <xiaotaow@cs.columbia.edu>
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Cc: iptel@ietf.org, sipping@ietf.org, "Henning G. Schulzrinne" <hgs@cs.columbia.edu>
Subject: [Iptel] Re: [Sipping] New draft on end system communication services
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Xiaotao/Henning, Thanks for the *excellent* draft. It effectively addresses a lot of CPL limitations. Even though your draft has the noble intent of end-devices, I can see B2BUA providers rubbing their hands in glee ;-) One quick comment: Is it at all possible to provide an interface using which a person creating a service in LESS can do a database-dip to resolve a URI ? Hardcoding URIs into scripts is often very limiting. To make it more general, it would be very useful if there was a way in which applications could 'intercept' the call flow of LESS for the only purpose of providing 'input' to the next stage. More comments later as I digest the rest. regds arjun On Thu, 17 Feb 2005 19:33:16 -0500 (EST), Xiaotao Wu <xiaotaow@cs.columbia.edu> wrote: > We have written a new draft on the Language for End System Services (LESS) > > http://www.ietf.org/internet-drafts/draft-wu-iptel-less-00.txt > > This work can be closely related to the SIP P2P work because in a P2P > network, there is no infra-structure to provide communication services, > for example, phone spam filtering. Usually, users will not put their > services on peers' node due to privacy and security reasons. That makes > end system services very important, and it is necessary to define a > mechanism for end system service creation. > > >From the abstract: > > In Internet telephony, end systems can take a large role in providing > services, especially in networks without pre-configured > infra-structure, such as peer-to-peer networks. Since we believe > that end system services differ in their requirements from network > services, we define a new service creation scripting language called > the Language for End System Services (LESS). LESS inherits many > characteristics from the Call Processing Language (CPL). It contains > commands and events for direct user interaction and the control of > media applications. This document defines the basic elements of LESS > and several commonly used LESS extensions. > > Suggestions and comments would be appreciated. > > -Xiaotao > > =========================================================== > Name : Xiaotao Wu > Email : xiaotaow@cs.columbia.edu > Homepage : http://www.cs.columbia.edu/~xiaotaow > Phone : (212)939-7054, Fax: (212)666-0140 > Phone-PC : (212)939-7133 > SIP : sip:xiaotaow@conductor.cs.columbia.edu > Office : Room 506, Computer Science building, West 120th > =========================================================== > > _______________________________________________ > Sipping mailing list https://www1.ietf.org/mailman/listinfo/sipping > This list is for NEW development of the application of SIP > Use sip-implementors@cs.columbia.edu for questions on current sip > Use sip@ietf.org for new developments of core SIP > -- Arjun Roychowdhury _______________________________________________ Iptel mailing list Iptel@ietf.org https://www1.ietf.org/mailman/listinfo/iptel
- [Iptel] Re: [Sipping] New draft on end system com… Henning Schulzrinne
- [Iptel] RE: [Sipping] New draft on end system com… Xiaotao Wu
- [Iptel] Re: [Sipping] New draft on end system com… Xiaotao Wu
- [Iptel] Re: [Sipping] New draft on end system com… Arjun Roychowdhury
- [Iptel] RE: [Sipping] New draft on end system com… Gunnar Hellstrom
- [Iptel] RE: [Sipping] New draft on end system com… Gunnar Hellstrom