Abstract: A test system and method that generates and executes test calls and verifies signaling for test calls using in-band, out-of-band and ISDN signaling. The test system captures signaling data from the origination and termination sides of test calls that use both in band, out-of-band and ISDN signaling techniques. The captured data is saved in a computer file and stored in a computer database for subsequent use. When the test case is subsequently executed, the captured data is retrieved from the database and used to verify signaling data by comparing the captured data from the test call with the previously captured data. The test case generator builds test calls by presenting to a user, a menu for each step in a test call. The user creates test calls by selecting list items and by entering keyboard data where appropriate. In this fashion, test calls are created without needing specialized knowledge of specific languages used by test call execution systems.