177
Dialogic
®
DSI SS7MD Programmer’s Manual Issue 3
Appendix A: Protocol Configuration Using Discrete Messages
This appendix provides guidelines for protocol configuration using individual messages.
A.1
Protocol Configuration Using Individual Messages
As an alternative to using the
s7_mgt
protocol configuration utility (see
Section 4.5.1, “Protocol Configuration
Using the s7_mgt Utility” on page 32
), it is possible to perform protocol configuration by building and
sending messages directly to the board. This approach means that it is necessary to write some application
code to handle configuration, but has the advantage that the application can, if required, reconfigure the
board without restarting the application.
Communication with the board is achieved by sending and receiving messages. The configuration sequence
is described below. The application should allocate a message structure using the
getm( )
library function
and send it to the board using the
GCT_send( )
library function. The application should periodically call the
GCT_receive( )
or
GCT_grab( )
library functions to receive messages from the board. The
GCT_receive( )
function blocks until a message is available, while the
GCT_grab( )
function returns
immediately. Once the application has finished processing the received message, it should release the
message structure back to the system by calling the
relm( )
library function. All library functions are
described in the
Software Environment Programmer's Manual
.
To configure the board using individual messages, the following sequence should be used. The message
sequence is shown diagramatically in
Figure 3
.
Note:
The format of all the messages is described in
Chapter 6, “Message Reference”
.
1. Build and send an
SSD Reset Request
(
SSD_MSG_RESET
) to the SSD module. This message contains the
parameters required to initialize the SSD module.
2. Then build and send a
Board Reset Request
(
SSD_MSG_RST_BOARD
) for each board in the system. This
message contains the address (or identifier) of the board and the name of the codefile. It causes the
board to be reset and the codefile downloaded. For each board, the application should wait until a
Board
Status Indication
(
SSD_MSG_STATE_IND
) is received and inspect the status field to determine if the
reset operation was successful. On failure, the user should check carefully the ssdm parameters and try
again. On success, the user should continue with the next step.
3. Build and send a
Board Configuration Request
(
MGT_MSG_CONFIG0
) to the onboard management task
(MGMT_TASK_ID) to configure the basic board parameters. When using Dialogic
®
DSI SS7MD Boards,
the value of the
config_type
parameter in the
Board Configuration Request
must be set to 3. For this
version of the message, the automatic configuration of MTP parameters is not supported. Wait for the
confirmation message and check the status.
4. To set up the LIU and port for the T1/E1 ports, the
LIU Configuration Request
(
LIU_MSG_CONFIG
) should
be used. Wait for the confirmation message for each LIU and check the status.
For each link in the system:
5. Build and send a
Layer 1 Configuration Request
(
MGT_MSG_L1_CONFIG
) to set up the physical
configuration parameters for the link. This message should be sent to the onboard management module.
Wait for the confirmation message and check the status.
6. Build and send an MTP2 Link Configuration Request (SS7_MSG_CONFIG) to set up the MTP2
configuration parameters. See the
MTP2 Programmer’s Manual
for the message definition. Wait for the
confirmation message and check the status.
7. Build and send an MTP3 Module Reset Message (MTP_MSG_RESET) to reset the MTP3 module. See the
MTP3 Programmer’s Manual
for the message definition. Wait for the confirmation message and check the
status.
8. Build and send an MTP3 Module Configuration Request (MTP_MSG_CONFIG) to set up configuration
parameters that relate to the MTP3 environment (number of link sets and links to support, module_ids
for user part modules etc.). See the
MTP3 Programmer’s Manual
for the message definition. Wait for the
confirmation message and check the status.
For each link in the link set perform the following:
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