Re: [Iptel] CPL as a standard for distinctive ringing

[Jonathan Lennox <[e-mail]>]

On Wednesday, February 4 2004, "[e-mail]" wrote to "[e-mail], [e-mail]" saying:

> This is regarding the suggested hypothetical extension to CPL
> (draft-ietf-iptel-cpl-08: chapter 12.10) for distinctive ringing.
> 
> This extension was originally proposed in the 03 version of the draft.
> Since then it has been kept as a "hypothetical" extension and _not_ as a
> "standard" action node in 5 more later versions including the latest 08
> version.
> 
> I would like to know the possibility/ acceptance of "ring"
> (draft-ietf-iptel-cpl-08: chapter 12.10) node coming in the standard CPL
> schema in future versions of the draft.
> 
> Also response from SIP proxy developers, who are following the suggested
> extension for their distinctive ringing implementation, will be
> appreciated.

CPL is intended as a language for controlling SIP proxy servers.  There's no
(standardized) way to implement distinctive ring in a proxy server; it needs
to be done by user agents.

You might want to take a look at Xiaotao Wu's LESS, the Language for End
System Services.  It's an extension of CPL designed for end-system control
of this sort.

-- 
Jonathan Lennox
[e-mail]

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