[Asterisk-Users] ISDN TBCT....

[Mark Spencer]

Facility IE seems to be the "ioctl" of the ISDN world.  Even if you look
at the intel app note, it leaves out a lot of details about what's going
on.  I'd love to get TBCT if anyone can find me a good, complete spec for
implementing it.

Mark

On Mon, 10 Nov 2003, Gene Kochanowsky wrote:

> Hi Gavin,
>
> According to Sprint here in Tallahassee it is supported on the DMS100 for an NI2 ISDN PRI. I am aware of the Intel tech note you refer to. You can find the code snippit it contains spread all over the place. According to the docs it was tested on a DMS100 using an NI2 ISDN PRI. However I have not been able to get it to work. I need call transfer in my app and I do not want to trombone. My problem is that I can find published specs on ISDN PRI NI2 all the way down to the facility message. After that nothing. So I do not know if the message I am sending is correct and both Sprint and Nortel have been useless. If anyone has done this and would care to share what they know about it I would appreciate it.
>
> Gene Kochanowsky
>
> 	-----Original Message-----
> 	From: Gavin Hollinger [mailto:digium.com at gavinhollinger.com]
> 	Sent: Mon 11/10/2003 2:00 PM
> 	To: asterisk-users at lists.digium.com
> 	Cc:
> 	Subject: Re: [Asterisk-Users] ISDN TBCT....
>
>
>
> 	TBCT (Two B Channel Transfer) would drastically reduce b-channel load in
> 	some applications.  Great for find me follow me Unified communicator type
> 	services.  Incoming calls answered on your cell phone etc.  I am very
> 	uneducated on this feature.  How could I find out more about it?  Does
> 	anyone have an example of this?  Does it work with Nortel?  Per Intel: "this
> 	feature is supported for the 5ESS and 4ESS protocols only"
>
> 	http://resource.intel.com/telecom/support/releases/unix51/linux51/SR5.1_Linu
> 	x/Onldoc/html_files/gcisdn/appxis23.htm
>
>
> 	Network Facility Request - Two B Channel Transfer (TBCT) (Synchronous Mode)
> 	TBCT enables an ISDN PRI user to request the switch to connect together two
> 	independent calls on the user's interface. The two calls can be served by
> 	the same PRI trunk or by different PRI trunks. If the switch accepts the
> 	request, the user is released from the calls and the two calls are connected
> 	directly. Billing for the two original calls continues in the same manner as
> 	if the transfer had not occurred. As an option, TBCT also allows for
> 	transfer notification to the transferred users.
>
> 	TBCT works only when all of the following conditions are met:
>
> 	The user subscribes to TBCT (this feature is supported for the 5ESS and 4ESS
> 	protocols only).
>
> 	The two calls are of compatible bearer capabilities.
>
> 	At least one of the two calls is answered. If the other call is outgoing
> 	from the user, it may be either answered or alerting; if the other call is
> 	incoming to the user, it must be answered.
>
>
> 	----- Original Message -----
> 	From: "Gene Kochanowsky" <gene at solutionsciences.com>
> 	To: <asterisk-users at lists.digium.com>
> 	Sent: Monday, November 10, 2003 6:59 AM
> 	Subject: [Asterisk-Users] ISDN TBCT....
>
>
> 	> Greetings,
> 	>
> 	> This may be a bit arcane but does anyone know what the contents of a
> 	facility message should be for initiating a TBCT on an NI2 ISDN. I've been
> 	trying to get it to work on a DMS100 for the last four months to no avail.
> 	The message I am currently sending makes it to the switch but is returned
> 	with unknown message. Perhaps someone here has done it before and can help
> 	me out.
> 	>
> 	> Thanks
> 	>
> 	> Gene Kochanowsky
> 	>                   ׫ Rǫf)+- ^+$K
  l  r  b v("oܢoj)fj b˝?j ^+$ 

>
> 	_______________________________________________
> 	Asterisk-Users mailing list
> 	Asterisk-Users at lists.digium.com
> 	http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
>