Re: Need clarifications on SVC's initiated from media gateway..

Does the protocol stop from sending requests once the SVC request is sent out.

I'm talking of the scenario, where in we send SVC request and waiting for response. In the mean time

I also send the notify message assuming that I will receive SVC response and this notify reaches

the peer only after the peer has processed the SVC request.
 

So, in this kind of a scenarion where in I'm assured of registration, I think it's ok to send the commands while waiting for the SVC response.

 

However, I want to know if the protocol anywhere restricts from initiating commands before the registration is completed??

 

Regards,

Prathap

 ;

On 4/5/07, Christian Groves < Christian.Grovesnteczone.com">Christian.Grovesnteczone.com> wrote:

Hello Arvind,

There's even a specific error for this. E.g. H.248.8
4.2.44 Error code #: 505
Name: Transaction Request Received before a ServiceChange Reply has been
received
Definition: Sent by the MG/MGC which has sent a ServiceChange request to
an MGC/MG and
receives a transaction request from that MGC/MG before it has received
the corresponding
ServiceChange reply. The actions included in the transaction request are
not carried out.
Reference: 11.2/H.248.1
Error text in the error descriptor: –
Comment: –

Regards, Christian

Stephen Mell (CV/ETL) wrote:
>; Issue (1)
> You can't send commands from the MG such as notify without having a
> Control Association in place.
>; An example of a time that you may find yourself wanting to do this is
> when you have a non-empty default events descriptor
> provisioned on a termination, and this events descriptor is applied
&gt; when the Terminations restart at a Cold Boot.
> In this case I think that you should only apply the termination
> descriptors and property defaults at the time when Control Association
> Establishment completes, so that the termination is discarding events
>; whilst the ServiceChange is in progress.
> If the Control Association stalls, or is explicitly taken away by
> Management Action then the MG should wait until it is fully re-established
> or a new one established (Service Change is Completed) before issuing
&gt; any other commands.
> Issue (2)
> You should not to transmit Notify Requests whilst the Control
> Association is incomplete, as this is illegal
&gt; Steve
>
> ------------------------------------------------------------------------
>; *From Arvind Charanyan [mailto: arvind.charanyanccpu.com"> arvind.charanyanccpu.com]
> *Sent Monday, April 02, 2007 10:49
> *To megacoietf.org">megacoietf.org
> *Subject [Megaco] Need clarifications on SVC's initiated from media
&gt; gateway..
>
> Hi All:
>
> I need some clarifications on issues which are described below:
>;
> Issue 1:
>
&gt; 1) Media gateway initiates service change request, and waiting for a
> response.
>
> 2) When Notify events occur in this period how should we handle them?
>
> Should we send out the notify requests to the MGC to which we have
> initiated the SVC? Or queue them until the control association is
> established?
>
>; Issue 2:
>
&gt; If we decide to transmit notify requests while waiting for service
&gt; change response, then how do we handle Notify response timeouts?
>
> Moreover, when we fail to establish Control association to the Primary
> MGC and failover to the secondary, what should be done to the
>
&gt; Notify requests that were being transmitted to the primary? Should we
> abort all those transactions or should the same be retried on the
> secondary?
>
> Thanks and Regards,
&gt;
> Arvind
>;
> ------------------------------------------------------------------------
>;
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> Megaco mailing list
> Megacoietf.org">Megacoietf.org
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>


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