Subject: [Megaco] Question about H.248 ADD command

From: "lpy" <[email-masked]>
Date: Mon, 23 Sep 2002 16:23:19 +0800

Dear all,
    I have a basic doubt about the Add command. Could anyone please answer it?
In draft-ietf-megaco-callflows-00.txt ,2.2 Call between Residential Gateway and Trunking Gateway,
there has written with <<In this example as mentioned earlier we doesn't assume any specific 
signaling in the other side of the Trunking gateway. This eliminates 
the complexity of reporting the address information and alerting the 
end user. The MGC then "Adds" a physical termination. The wildcard $ 
is used here to enable the Trunking gateway to choose one of its 
trunks on the other side of the Trunking gateway. The ephemeral 
termination is requested to create with the under specified SDP local 
information and the remote SDP information.

Step 9
MGC to TGW
   MEGACO/1 [216.33.33.61]: 27000
   Transaction = 1236 {
       Context = $ {
          Add = Trunk1/$  {Media {
                    LocalControl {Mode = SendRecv}},
               },

 My question is marked with  blue colour,(I consider MGC should specify the link ,not let TGW to choose)
 Please mailto: [email-masked] ,thanks a lot.

 Best regard!