please search dbwin tool on support website;
Step 1 Log in to the IAD CLI by PUTTY. In the advanced mode, run the system soft-parameter dbwin-switch command to enable the DBWIN function.
//account/pd: root / huawei123
// how to switch to advanced mode :
TERMINAL> //this is beginning user mode

The command is as follows:
TERMINAL(advanced-config)#system soft-parameter dbwin-switch on
Execution of command succeeded
Then, enable the module switch.
TERMINAL(advanced-config)#system soft-parameter log-pid PID_RM on
TERMINAL(advanced-config)#system soft-parameter log-pid PID_SPI on
TERMINAL(advanced-config)#system soft-parameter log-pid PID_PM on
TERMINAL(advanced-config)#system soft-parameter log-pid VOS_PID_SSM on
If the SIP mode is used, run the following command:
TERMINAL(advanced-config)#system soft-parameter log-pid PID_SIP_APP on
In MGCP mode, run the following command:
TERMINAL(advanced-config)#system soft-parameter log-pid PID_MGCP on
Step 2 Double-click XDBWIN.exe and click Show, as shown in the following figure.
Step 3 Click New Debug.
Step 4 In the dialog box that is displayed, click Yes.
Step 5 In the Connect Host dialog box, enter the IP address of the IAD to be connected and click OK, as shown in the following figure.
Step 6 In the New Debug dialog box, click OK.
Step 7 Create a file for debugging information.
For example, create an off-hook .msg file and click Open, as shown in the following figure. A single .dat, .msg, or .txt file is generated.
When test done, try to find save button in tool mean, and also save logs as .txt fiel.
Finally, feedback .msg and .txt file together.
Step 8 disable debug mode:
TERMINAL(advanced-config)#system soft-parameter dbwin-switch off