call batch file from another passing parameters

I believe you want something like this?

@echo off

:: Fetch param1
set "param1=%~1"
goto :param1Check
:param1Prompt
set /p "param1=Enter parameter 1: "
:param1Check
if "%param1%"=="" goto :param1Prompt

:: Fetch param2    
set "param2=%~2"
goto :param2Check
:param2Prompt
set /p "param2=Enter parameter 2: "
:param2Check
if "%param2%"=="" goto :param2Prompt

:: Process the params
echo param1=%param1%
echo param2=%param2%

Test.bat run without arguments:

>>test.bat
Enter parameter 1: foo
Enter parameter 2: bar
param1=foo
param2=bar

Test.bat run with arguments:

>>test.bat foo bar
param1=foo
param2=bar

---

Alternative, using environment variables instead of command line arguments (see also ppumkin's answer):

@echo off  

:: Fetch param1  
**set "param1=%globalparam1%"**  
goto :param1Check  
:param1Prompt  
set /p "param1=Enter parameter 1: "  
:param1Check  
if "%param1%"=="" goto :param1Prompt  

:: Fetch param2    
**set "param2=%globalparam2%"**  
goto :param2Check  
:param2Prompt  
set /p "param2=Enter parameter 2: "  
:param2Check  
if "%param2%"=="" goto :param2Prompt  

:: Process the params  
echo param1=%param1%  
echo param2=%param2%

Just set the environment variables globalparam1 and globalparam2 in your environment or your calling batch file to suppress the prompting:

Test.bat run without setting environment variables:

>>test.bat
Enter parameter 1: foo
Enter parameter 2: bar
param1=foo
param2=bar

Test.bat run with setting environment variables:

>>set globalparam1=foo

>>set globalparam2=bar

>>test
param1=foo
param2=bar

Note: setting the environment variables can also be done in e.g. a calling batch script.

In main.cmd:

set param1=%~1
set param2=%~2
echo %param1% - %param2%

In caller.cmd:

call main.cmd hello world

Output:

hello - world

Reference for batch script parameters

caller.bat /.cmd

@echo off
cls
set vara="Hello There"
set varb=67890

echo Variables set in caller.bat:
echo %vara%
echo %varb%

echo Calling passTo.bat
call passTo.bat %vara% %varb%

passTo.bat /.cmd

@echo off
echo.
echo Inside passTo.bat
set vara=%1
set varb=%2

echo vara: %vara%
echo varb: %varb%

Calling passTo.bat on its own from dos or command windows or any other application/shortcut

call passTo.bat PARAM1 PARAM2

---

Using the set Variables from caller.bat inside another batch

@echo off
echo.
echo Inside another.bat
echo -- You can start another batch here that sets the environment variables

set varOne=%vara% <- This gets the Environments Variable set in the nested batch bat using SET
set varTwo=%varb%

echo vara: %varOne% 
echo Is the same as
echo %vara%

echo varb: %varTwo%
echo is again the same as
echo %varb$

You might have to use SETX