Subject: [Sigtran] Fw: M3UA SCON

From: "Vikas Goel(China)" <[email-masked]>
Date: Thu, 6 Jun 2002 10:38:07 +0800

----- Original Message ----- 
From: [email-masked] 
To: [email-masked] 
Sent: Thursday, June 06, 2002 10:32 AM
Subject: M3UA SCON

Dear Brian,

  I have a doubt in implementing the SCON message at ASP side.

  According to description in draft12, we have to fill Concerned DPC field and Affected DPCs when we send SCON from ASP to SGP.

Pls refer the case as shown in the diagram below,

                                                AS1 : Signalling PC = 1
                                              _______
                              |--------------|       |
    |-----|                   |              | ASP1  |
    | SGP |-------------------|              |_______|
    |-----|                   |              ________
                              |             |        |
                              |_____________|   ASP1 |
                                            |________|
                                                AS2 : Signalling PC = 2

When the ASP1 is congested, we should send SCON from ASP1 to SGP. My doubt is:
<1>If ASP1 is operating in 2 diff AS (say AS1 and AS2), what should we fill in "affected DPC list" and "Concerned DPC" parameter ? As per my
understanding, Affected DPC is 1 and 2(OPCs of AS1 & AS2). Concerned DPC is either 1 or 2. Is it correct ? If this is so, what is the need of
"Concerned DPC" in SCON message ?

<2> If SGP receives the SCON from ASP, what is the action to be taken related to Concerned DPC ? what is the significance of "Concerned DPC" in SCON
sent from ASP to SGP ?

Thanks and regards.
-Jesy