[asterisk-dev] ISDN ETSI Call Rerouting

[Klaus Darilion]

Steve Totaro schrieb:
> On Wed, Jun 4, 2008 at 9:30 AM, Klaus Darilion
> <klaus.mailinglists at pernau.at> wrote:
>>
>> Steve Totaro schrieb:
>>> On Wed, Jun 4, 2008 at 8:23 AM, Klaus Darilion
>>> <klaus.mailinglists at pernau.at> wrote:
>>>> Hi!
>>>>
>>>> I have Asterisk in front of an Siemens PBX which sends Call Rerouting
>>>> messages (e.g. a user forwards incoming calls to its mobile phone).
>>>>
>>>> The ETSI Call Rerouting works this way:
>>>>
>>>>                                        Hicom   rerouting
>>>> Caller          Telco                   PBX     target
>>>> ------SETUP-----> |
>>>>                   | ----SETUP------------>
>>>>                   |
>>>>                   | <---CALL PROCEEDING---
>>>>                   |
>>>>                   | <---FACILITY+ --------
>>>>                   |    EtsiCallRerouting
>>>>                   |
>>>>                   | ----DISCONNECT------->
>>>>                   | <---RELEASE-----------
>>>>                   | ----RELEASE COMPLETE->
>>>>                   |
>>>>                   | ----SETUP--------------------->
>>>>
>>>>
>>>>
>>>> Thus, I would like to have Asterisk to forward the FACILITY message to
>>>> the telco. I use Asterisk 1.2 which does not support it and AFAIK there
>>>> is also no support for that in 1.4.
>>>>
>>>> Before starting coding I want to know if there is already support for
>>>> that (or at least for decoding/encoding the ETSI Call Rerouting)
>>>> Asterisk 1.6 or trunk?
>>>>
>>>> thanks
>>>> Klaus
>>>>
>>> Is this what you are looking for? http://kb.digium.com/entry/140/
>>>
>>> RLT, What is it?
>> This sound a bit different. From the description on
>> http://www.voip-info.org/wiki-Asterisk+bounty+PRI+2B+channel+transfer it
>> sounds to me that the RLT feature uses 2 B channels for a short time
>> (until the get bridged and cleared by the switch) whereas ETSI Call
>> Rerouting does not setup a second B channel. I think this ETSI Call
>> Rerouting is similar to ISDN Call Deflection but uses FACILITY instead
>> of INFO (which I guess is used for call deflection).
>>
>> regards
>> klaus
>>
> 
> Wouldn't you prefer to free up all of your channels?  I guess go with
> what works.
> 


It does free up all the channels (see above figure) to the PBX.

regards
Klaus