Subject: [Sigtran] SDTI parameter in a link key registration request m2ua message

From: Pablo Salinas <[email-masked]>
Date: Fri, 1 Aug 2003 14:02:51 -0500 (CDT)

Hi there,
         I've searched information about the SDTI parameter inside the registration request message. I've read the Clause 12 of the Q.704 Document. I also took a look at the Q.751-1 document. What I could understand from these documents is that the SDTI parameter in a Registration Request M2UA Message represents a piece of hardware able to manage various SS7 Links.
So, my question for you people is the following:
Could the SDTI parameter represent a E1/T1 card inside a machine working as Signaling Gateway(figure 1)?

Or, it represents a machine that works in armony with other machines being each one of them a SDT(figure 2)?

-------------------------------------------------
|  Signaling Gateway                  |
|  (Phisical block)                       |
|                                               |
|      ----------------   ------------------    |
|     |                |   |                 |   |
|     |    SDT      |   | SDT         |   |
|     |                |   |                 |  |
|     | E1/T1 card|  |E1/T1 card  |  |
|     |---------------- |  |-----------------|  |
|             |                  |              |
|             |                  |              |
|             |                  |              |
|             |mux/demux |              |
|             |------------------|              |
|                      |                        |
|----------------------|-------------------------
    Link set       |
 ---------------------|

    figure 1

-------------------------------------------------
|  Signaling Gateway                  |
|  (Logical block)                        |
|                                               |
|      ----------------   ------------------    |
|     | (Physical |   | (Physical   |   |
|     |  Block)    |   |  Block)      |   |

|     |    SDT      |   | SDT         |   |
|     |                |   |                 |  |
|     | E1/T1 card|  |E1/T1 card  |  |
|     |---------------- |  |-----------------|  |
|             |                  |              |
|             |                  |              |
|             |                  |              |
|             |mux/demux |              |
|             |------------------|              |
|                      |                        |
|----------------------|-------------------------
    Link set       |
 ---------------------|

    figure 2

If it is as figure 2 indicates, there should be another phisical block working as managment device of the SDT's, rigth?

Another thing, I was thinking about, was the procedures the MTP3 Layer (the M2UA Layer user within the MGC)  should do.
After it calls the M-LINK_KEY_REG Request, it should send a Signalling-data-link-connection-order message (MTP3 message) to the STP in the SS7 network, rigth?

Please anyone help me out on this one. Thanks everybody,
                                                         Pablo S.

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