[asterisk-dev] ISDN ETSI Call Rerouting

[Klaus Darilion]

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