[Asterisk-Users] ISDN Primary Rate Interface (PRI) - 2B Transfer

[John Todd]

>Does * support ISDN Primary Rate Interface (PRI) - 2B Transfer 
>Capability for T-1/PRI?
>  In other words the ability to take a call and join it to another 
>call and then drop off letting the CO-switch take over.
>
>-Kevin
>
>Kevin Fjelsted, President
>AltiCom CTI, Inc.
>
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Kevin -
   Firstly, I'll save Steven Critchfield from complaining, and do it 
myself: please don't post HTML mail to the list.  It takes a few 
extra steps for me to even read your teeny, tiny little font on my 
particular system, so I'm less likely to read or answer your mail if 
it's in HTML.  It might look good on your screen, but you gamble on 
everyone else's machine being able to present things correctly.

   Secondly, no, Asterisk doesn't understand 2B Transfer.  There was 
some discussion a while ago on the topic, some of which didn't make 
it to the list.  I include it below.

JT



>Date: Thu, 15 May 2003 13:46:27 -0700
>To: Martin Pycko <martinp at digium.com>
>From: John Todd <jtodd at loligo.com>
>Subject: Re: [Asterisk-Users] app_transfer
>Cc: Jim Gottlieb <jimmy-ml at nccom.com>,markster at digium.com
>Bcc:
>
>
>Here is documentation on the 2B channel transfer protocol that I 
>think is being discussed.  Note that I do not know the copyright 
>issues involved in having this on my website, so it may go away 
>shortly, and making copies of your own is encouraged.
>
>http://volume.fox-den.com/asterisk/misc/GR_2BchanXfer.pdf
>
>Personally, I think that PRI ports are cheap enough using Digium 
>cards that this is an unnecessary feature to implement.  Plus, 
>billing feedback on this is a nightmare, since call control is 
>released back to the switch (but that is accounted for.)  However, I 
>am spoiled by inexpensive North American telecom charges, so perhaps 
>this would be worthwhile for some people who are not in my envious 
>situation.
>
>JT
>
>
>>Do you have documentation about it ?
>>
>>regards
>>Martin
>>
>>On Thu, 15 May 2003, Jim Gottlieb wrote:
>>
>>>  On 2003-05-14 at 00:49, Mark Spencer (markster at digium.com) wrote:
>>>
>>>  > I've added an important new application: app_transfer.
>>>
>>>  Is there any support in the PRI protocol for call transfer?  Our switch
>>>  (Lucent/Excel) supports call transfer and it works of course on FX
>>>  lines, but it would be nice if we could effect a real transfer instead
>>  > of just bridging two PRI channels.  This would free up a lot of ports.