[Freeswitch-users] TDM-to-TDM Pass-through Media

[Mehdi Shirazi]

Hi
Regarding Freeswitch shares same DAHDI and libpri with Asterisk, if there was no reason to call comes inside
server ( like codec conversion ,inband DTMF processing , call waiting)... Theoretically this two case should
be possible:


1-In DAHDI-driven cards supports direct timeslot bridging (interchange)(E1/T1s in same span cards) the 
audio won't even pass across the system bus at all.


http://lists.digium.com/pipermail/asterisk-dev/2010-March/043056.html

2-With another interesting service = 2BCT(Two B-Channel Transfer)(ITU version ECT = Explicit Call Transfer)
even it is possible to free both B channels and transfer Call to Local switch( if both sides was on same 
E1/T1 span) 


http://support.digium.com/Answers?id=kA080000000GwmUCAS


Regards
M.Shirazi




>bypass and proxy media is only useful for rtp based calls (read sip to sip) you still have yo copy frames >from on t1/e1 port to the other port. 



>Sent from my iPhone 

>> On Sep 9, 2017, at 08:35, Nandy Dagondon <nandy1925 at gmail.com> wrote: 
>>  
>> Hello folks, 
>>  
>> I have a setup wherein I inserted FS in-between a PSTN exchange and a PABX linked via E1 R2.  My TDM card >>has dual E1 ports - port A is connected to the exchange and port B to the PABX.  If there's a call that pass->>through FS (EXCH > PABX and vice-versa), I want incoming media from one port to immediately sent to the >>other port.  What mode should I set in the dialplan?  proxy_media or bypass_media?  I have read the Wiki on >>proxy_media. It's very clear to me re handling of TDM media. 
>>  
>> Thanks in advance for the inputs. 
>>  
>> /Nandy