Subject: RE: [Megaco] ServiceChange indicating multiple terminations

From: "Wainwright, John \(Com US\)" <[email-masked]>
Date: Thu, 10 Aug 2006 14:09:01 -0700

According to H.248.1 v3 sections F.3.9 & F.3.10 the MGC can send a
Service Change command to the MG with ServiceChangeMethod of Restart,
Forced or Graceful as well as Handoff which you mention.
 
John

________________________________

From: Oikonomou, Ioannis [mailto:[email-masked]] 
Sent: Thursday, August 10, 2006 3:35 PM
To: [email-masked]
Subject: [Megaco] ServiceChange indicating multiple terminations

Hello,

I have 2 questions concerning the ServiceChange command:

1) ServiceChange(Handoff) is the only ServiceChange command that an MGC
is allowed to send towards an MG. Is this correct?

2) Is the following syntax allowed?

MEGACO/1 [216.33.33.61]: 25000
Transaction = 4321 {
    Context = - {
        ServiceChange = TermA, TermB, TermC { Services {
            Method = Forced }
        }
    }
}

The syntax for ServiceChange is the following according to H.248.1:

ServiceChangeRequest ::= SEQUENCE

{

     terminationID              TerminationIDList,

     serviceChangeParms         ServiceChangeParm,

     ...

}

TerminationIDList ::= SEQUENCE OF TerminationID

TerminationID ::= SEQUENCE

{

     wildcard  SEQUENCE OF WildcardField, 

     id    OCTET STRING(SIZE(1..8)),

     ...

}

WildcardField ::= OCTET STRING(SIZE(1))

Ioannis Oikonomou

Senior Software Engineer

Siemens SA

Greece

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