[Megaco] Cancel Service Change (method=Graceful) mechanism

[knayar@hss.hns.com]

Hi

It seems the protocol doesnot define any procedure for cancelling an earlier
Service Change (method=Graceful) on a non-root termination.

Taking a practical case:
MG sends a Service Change (method=Graceful) on a termination with delay= 2
hours.
After 1 hour, MG realizes that it doesn't want to put the termination
out-of-service (after remaining 1 hour) as was earlier intended.
How to inform the MGC of the new intentions - cancel graceful..?
Sending Service Change (method =Restart) would mean that termination just came
InService and doesnot have any active descriptors, whereas this is not the case.

Solution:
MG sends Service Change (method = Graceful) delay =2 hours to inform MGC only
about the intentions.
MG sends Service Change (method = Forced) when the termination actually goes
out-of-service after 2 hours.
This ensures that if Service Change (method = Forced) never came, the intentions
of MG never got materialised.

Does any body have an alternative solution? Please suggest.

thanks,
kapil nayar
www.hssworld.com


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