asterisk users - Jul 2007 - Zaptel/mISDN and call transfer

Hi list,

I am searching for a possibility to do a certain call transfer method
which is called "path replacement" in QSIG. But I want to do that in
DSS1 (EuroISDN). If my asterisk does a call transfer I want the machine
to signalize on dchan that the call path has to be replaced to a direct
connect between the caller and the called, i.e. my machine is to hang up
after the transfer and the channels are free again. Is it possible and
with what card vendor (mISDN vs.zaptel) and how do I do that?
Thanks in advance,

Christophorus

Hi!
> I am searching for a possibility to do a certain call transfer method
> which is called "path replacement" in QSIG. But I want to do that
in
> DSS1 (EuroISDN).
They keyword to search for is "explicit call transfer" (ECT). At least
chan_capi-com (http://www.melware.org/ChanCapi) comes with support for 
that. Don't know about mISDN.

Cheers, Philipp

Hi!
>>> I am searching for a possibility to do a certain call transfer
method
>>> which is called "path replacement" in QSIG. But I want to
do that in
>>> DSS1 (EuroISDN).
>>>     
>> They keyword to search for is "explicit call transfer" (ECT).
At least
>> chan_capi-com (http://www.melware.org/ChanCapi) comes with support 
>> for that. Don't know about mISDN.
>>
> Thanks, but can I use chan_capi as frontend to mISDN or zaptel
> hardware?
You can run chan_capi on top of mISDN, but I have never done this myself 
(be careful to not confuse mISDN with chan_misdn). Anyway, I am not sure 
what "mISDN hardware" would be, whereas "CAPI hardware"
would refer to
cards that come along with a CAPI interface/driver like Eicon Diva or 
various AVM products, possibly also HST products.
> As I know I do have to choose between digium or beronet/junghanns
> hardware (E1) to use PRI with asterisk, right?
Or Sangoma (which uses zaptel), or Sirrix (comes with its own channel 
driver). My personal suggestion would be that you take a closer look at 
Eicon and Sangoma.
> Do I have to use chan_capi to access the zaptel hardware? 
That won't work.

By the way, you might want to also search for "call deflection" (CD)
and
"partial reroute" (for PtP = point-to-point connections = 
"Anlagenanschluss") next to ECT. See:

http://www.voip-info.org/wiki/view/ISDN+Features
http://www.voip-info.org/wiki/view/Asterisk+CAPI+readme
http://www.melware.org/ChanCapiCallReroute

Cheers, Philipp

Tzafrir Cohen schrieb:
> On Sat, Jul 14, 2007 at 01:23:35PM +0200, Christophorus Laube wrote:
>   
>> Hi list,
>>
>> I am searching for a possibility to do a certain call transfer method
>> which is called "path replacement" in QSIG. But I want to do
that in
>> DSS1 (EuroISDN). If my asterisk does a call transfer I want the machine
>> to signalize on dchan that the call path has to be replaced to a direct
>> connect between the caller and the called, i.e. my machine is to hang
up
>> after the transfer and the channels are free again. Is it possible and
>> with what card vendor (mISDN vs.zaptel) and how do I do that?
>> Thanks in advance,
>>     
>
> I found an old feature-request bug in Zaptel which seems relevant:
>
> http://bugs.digium.com/3554
>
> Not sure if this means that the feature is supported. Maybe ask Mathew
> Fredrikson or Digium support.
>
>   
by the way: Is this call deflection or ECT etc. only possible to be
executed at ring time or can I redirect a yet running call?
Thanks, Christophorus

Hi!
>> I found an old feature-request bug in Zaptel which seems relevant:
>>    http://bugs.digium.com/3554
>> Not sure if this means that the feature is supported. Maybe ask Mathew
>> Fredrikson or Digium support.
>
> by the way: Is this call deflection or ECT etc. only possible to be
> executed at ring time or can I redirect a yet running call? 
ECT only works after having answered a call (and having put it on hold on 
the ISDN side, not in Asterisk), see readme of chan_capi-cm for more 
info. Deflection, on the other hand, must be arranged before a call is 
answered.

I add to the wiki a tiny overview for the different methods and channels:
http://www.voip-info.org/wiki/view/Asterisk+cmd+Transfer

Of interest for you are probably:
* chan_misdn has this dialplan app: misdn_facility(calldeflect|9999)
* ZapCD for deflection as implemented by bristuff

Cheers, Philipp