[SIPForum-discussion] Dynamically enable and disable CallForwarding from a VoIP Phone

[Krishna Kalluri]

Hi,

I think the standard way to configure these kind of services is under
standardization. In IETF bliss WG (http://tools.ietf.org/wg/bliss/)  is
working on a frame work based on REST.

Please take a look at
http://tools.ietf.org/id/draft-griffin-bliss-rest-00.txt

Regards
Krishna

On Tue, Feb 3, 2009 at 5:02 AM, Vivek Batra
<Vivek.Batra at matrixtelesol.com>wrote:

>  Surely. It is Proxy/ B2BUA implementation dependent. You can check it in
> OnDo, Asterisk etc.
>
> I don't see any standard way of doing it till now.
>
> Proxy/ PBX should be configured in that way it should consider the some
> predefined prefix as access code to enable/ disable the feature.
>
>
>
> Best Regards,
>
> Vivek Batra
>
>
>  ------------------------------
>
> *From:* sreekant nair [mailto:sreekant_nair at yahoo.com]
> *Sent:* Tuesday, February 03, 2009 1:04 AM
> *To:* Vivek Batra; discussion at sipforum.org
> *Subject:* Re: [SIPForum-discussion] Dynamically enable and disable
> CallForwarding from a VoIP Phone
>
>
>
> Thanks Vivek,
>
> So does this mean that it is Proxy/B2BUA implementation dependent? OR Is
> there a standard way of doing it?
>
> In the example you mentioned, does the SIP Device send INVITE with the
> <123+destination number> and the proxy determines that this is "Enable CFU"
> and enables the appropriate feature?
>
> Thanks
> Sreekant
>
>
>  ------------------------------
>
> *From:* Vivek Batra <Vivek.Batra at Matrixtelesol.com>
> *To:* sreekant nair <sreekant_nair at yahoo.com>; discussion at sipforum.org
> *Sent:* Friday, January 30, 2009 11:32:11 PM
> *Subject:* RE: [SIPForum-discussion] Dynamically enable and disable
> CallForwarding from a VoIP Phone
>
> Some proxy/ IPPBX (B2BUA) uses the access codes to enable/ disable the
> feature. Say 123 is the access code to enable CF-U and 456789 is the
> destination where you want to forward the calls, your SIP device initiates
> the call to proxy having the number (123+456789) and Proxy/ B2BUA enables
> the CF-U for the caller.
>
>
>
> Best Regards,
>
> Vivek Batra
>
>
>  ------------------------------
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *sreekant nair
> *Sent:* Friday, January 30, 2009 10:17 PM
> *To:* discussion at sipforum.org
> *Subject:* [SIPForum-discussion] Dynamically enable and disable
> CallForwarding from a VoIP Phone
>
>
>
> Hello,
>
> I am trying to implement the most common three flavors of Call Forwarding
> (Call Forward Busy- CFB, Call Forward No Answer - CFNA and Call Forward
> Unconditional - CFU)
>
> The first two are relatively straight forward with some involvement from
> the User Agent and proxy  during the actual call event.
>
> However, when it comes to CFU, all the literature ( in OpenSER and
> http://www.tech-invite.com/Ti-sip-service-7.html etc) points to the Proxy
> being pre-configured with the information that any incoming call to User X
> must be forwarded to User Y. This is fine when it comes to the actual call
> signalling/messaging.
>
> However, how is it set in the first place within the proxy. Is there a
> method of doing this other than by for e.g. the proxy administrator
> manually? Can a SIP User Agent enable/disable call forwarding at the proxy
> using SIP signalling. To give a clearer picture - on my cell phone, I can
> enable/disable call forwarding for some period of time. When we do this, the
> service provider's MSC/HLR is updated with this information so that the call
> is automatically routed to the forwarded number. This call flow is very
> clearly explained in the lint of Call Forwarding Unconditional at "
> http://www.tech-invite.com/Ti-sip-service-7.html". It does not explain how
> the feature is enabled.
>
> Is using the "forwarding number/URI" in the Contact of the REGISTER message
> an industry accepted practice? Is there any other way without involving the
> phone so that proxy has prior knowledge and it is dynamic?
>
> All ideas are welcome.
>
> Thanks
> Sreekant Nair
>
>
>
>
>
>
>
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