KeepActive flag in signal

Hello all, 
 
In H.248.1 it is said  that
"A new Signals Descriptor replaces any existing Signals Descriptor. Any
signals applied to the termination not in the replacement descriptor
shall be stopped, and new signals are applied, except as follows.
Signals present in the replacement descriptor and containing the
KeepActive flag shall be continued if they are currently playing and
have not already completed. If a replacement Signals Descriptor contains
a signal that is not currently playing and contains the KeepActive flag,
that signal shall be ignored."
 
In my understanding to this statement , if a signal with keepactive flag
is not been played currently, it should be ignored. On the other hand
if it is been played now ,the play should not be interrupted ,which
means the new same signal is also not applied now. 
 
My question is  "Should the new signal be played after the old one is
finished ?"   If the answer is NO, then the signal with keepactive flag
will not make any sense because  it is always useless. 
 
 
Thank you very much !
 
 
 

Best regards,

 

Chen Hao

 

NSN R&D BBA

Tel: +86 10 58421052

Email: [email protected] <mailto:[email protected]> 

 

 


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