Subject: RE: [Sipping] Call Pickup Flow

From: Jonathan Rosenberg <[email-masked]>
Date: Wed, 1 Aug 2001 03:42:55 -0400

> -----Original Message-----
> From: Neil Deason [mailto:[email-masked]]
> Sent: Tuesday, July 31, 2001 8:05 AM
> To: Alan Johnston; SIPPING List
> Subject: RE: [Sipping] Call Pickup Flow
> 
> 
> Hi Alan.
> 
> The text referencing directed pickup through REGISTER has
> rightfully be removed from the bis 3+ drafts. This was
> because it didn't work in distributed envt's or provide
> the same user experience as may be expected. (The phone
> picking up rings). We also shouldn't be defining services
> within the protocol spec. (At the risk of provoking those
> who equate forking with a service defined in the spec).
> 
> If you really want you could show a call flow to emulate
> this service in SIP using a B2BUA (yawn). But please let's
> not hack REGISTER to do pickup. But really who cares there
> are many better call completion features which obselete
> pick up. User friendly forwarding services implemented
> through CPL mean no phone need ring unanswered ;)

Also, please note that the call packages draft:
http://www.jdrosen.net/papers/draft-rosenberg-sip-call-package-00.txt

contains a call flow for call park and pickup based on the call-leg event
package. Regular pickup is a subset of that and works even more easily. 

-Jonathan R.
---
Jonathan D. Rosenberg, Ph.D.                72 Eagle Rock Ave.
Chief Scientist                             First Floor
dynamicsoft                                 East Hanover, NJ 07936
[email-masked]                     FAX:   (973) 952-5050
http://www.jdrosen.net                      PHONE: (973) 952-5000
http://www.dynamicsoft.com

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