[SIPForum-discussion] Blind Transfer

[Robert Sparks]

http://www.ietf.org/internet-drafts/draft-ietf-sipping-cc- 
transfer-07.txt

Being a single line gateway, analog terminal adaptor, or whatever you  
want
to call the box that provides SIP to that analog phone doesn't affect  
the flow.

RjS

On Apr 4, 2007, at 1:56 AM, Siva M-Q16748 wrote:

> Hi Robert
>
> Thanks
>
> Any Idea how do we achieve this using the analog phone ??
>
> Thanks
> Siva M
>
> -----Original Message-----
> From: Robert Sparks [mailto:rjsparks at nostrum.com]
> Sent: Wednesday, April 04, 2007 11:21 AM
> To: Siva M-Q16748
> Cc: discussion at sipforum.org
> Subject: Re: [SIPForum-discussion] Blind Transfer
>
> A very long time ago, there was a proposal in the IETF that used an  
> Also
> header in a BYE message achieve this kind of transfer.
> Many problems were found with the idea and it was abandoned. REFER is
> the tool you want to use.
>
> RjS
>
> On Apr 4, 2007, at 12:38 AM, Siva M-Q16748 wrote:
>
>> Hi
>>
>> Can anyone point me to some call flows which will explains Blind
>> Transfer using BYE method .
>>
>> Basically I want to do Blind transfer with a analog phone hooked  
>> up to
>> Analog Adapter which will convert Analog to SIP .
>>
>> I press Hook Flash button to make the second call and ended up with
>> consultive transfer .The device sends INVITE for third party after
>> Hookflash is pressed and later REFER with replaces header.But Blind
>> Transfer with SIP phones sends REFER initially instead of INVITE .
>>
>> Heard somewhere that Blind transfer can be achieved using BYE .. Any
>> idea ??
>>
>>
>> Siva M
>>
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