答复: RE: 答复: Question on app lication of tones on ephemeral terminations

hi,
  I do agree. I think  if the DSP channel for VoIP is inactive status,no 
RTP package(signal or media) can go throug actually.




Michael Sun 孙红军
Network Planning & System Design Department

Product Marketing System 
产品市场体系
No.68 Zijinghua Rd,Yuhuatai District, NanJing.P.R.China
Tel:+86-25-52870503
Fax:+86-25-52871000
Email:[email protected] 





"PEREZ HERNANDEZ MARIA DEL MAR" 
<[email protected]> 
2009-05-14 06:32

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RE: [Megaco] 答复:  Question on application of tones on ephemeral 
terminations






Hello Michael Sun,
 
thanks for your answer and sorry for taking so long to thank you.
 
I fully agree with your view but there seems to be other views that defend 
the fact that since the ring-back tone is a signal, it must be played (and 
RTP packets sent to other end) even if termination "inactive". I learnt 
about a previously posted message on this issue (
http://www.ietf.org/mail-archive/web/megaco/current/msg07819.html) which 
seems to defend the fact that whatever the termination mode, a signal must 
be played. I agree that the signal must be played on the termination, but 
I think that once the signal is converted to media, it will be played but 
will not reach the other end since the RTP path is not opened 
("inactive"termination). Do you agree with this?
 
Thanks again and sorry for my delay,
 
MMAR

From: [email protected] [mailto:[email protected]] On Behalf 
Of [email protected]
Sent: Friday, May 08, 2009 4:42 AM
To: PEREZ HERNANDEZ MARIA DEL MAR
Cc: [email protected]; [email protected]
Subject: [Megaco] 答复: Question on application of tones on ephemeral 
terminations


I think MG is a controlled equipment.If it sends RPT packages ,It must be 
set to be active by MGC firstly



Michael Sun 孙红军 
Network Planning & System Design Department 

Product Marketing System 
产品市场体系 
No.68 Zijinghua Rd,Yuhuatai District, NanJing.P.R.China
Tel:+86-25-52870503
Fax:+86-25-52871000
Email:[email protected] 





"PEREZ HERNANDEZ MARIA DEL MAR" 
<[email protected]> 
发件人:  [email protected] 
2009-05-07 08:21 


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[Megaco] Question on application of tones on ephemeral terminations








Hi all, 
  
I know that a scenario where the ring-back tone is applied from the remote 
side emulating TDM is quite common. My question is about the correct mode 
of the remote ephemeral termination. 
  
According to H.248.1 (par 7.1.7) “Signals and Events are not affected by 
mode”, that is, the mode affects only the media. However, when a tone 
(Signal) is applied on an ephemeral termination, the tone is converted to 
media (RTP); therefore, if a Signal (ring-back tone) is applied to the 
remote ephemeral termination which is in “inactive” mode, what should be 
the behaviour of the MG? Should the RTP packets with the tone be sent 
outside the Context or not? 
  
Thanks, 
  
MMAR_______________________________________________
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