asterisk users - Sep 2003 - ISDN Primary Rate Interface (PRI) - 2B Transfer

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.
 
Track Me Down!
One number Access, Press 11# during the voice mail message greeting
to have me F-O-U-N-D!
 
Phone:  612.259.0722
Fax:      612.259.0723
VoIP:     65.209.158.245 Ext. 222
 
http://www.AltiComCTI.com <http://www.alticomcti.com/> 
 
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>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.
>
>Track Me Down!
>One number Access, Press 11# during the voice mail message greeting
>to have me F-O-U-N-D!
>
>Phone:  612.259.0722
>Fax:      612.259.0723
>VoIP:     65.209.158.245 Ext. 222
>
><http://www.alticomcti.com/>http://www.AltiComCTI.com
>
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@digium.com>
>From: John Todd <jtodd@loligo.com>
>Subject: Re: [Asterisk-Users] app_transfer
>Cc: Jim Gottlieb <jimmy-ml@nccom.com>,markster@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@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.