Differentiate INAP & MAP at TCAP level This topic has 1 reply, 1 voice, and was last updated 7 years, 6 months ago by Wallis Dudhnath. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 30th December 2003 at 06:51 #37218 Kwong KuekGuest HI I am doing a decoder that can decode INAP and MAP. Is there a way for me to know at the TCAP level whether the trace I am doing contains INAP or MAP data. Do we look at the operation code tag? thks 15th July 2015 at 15:51 #37219 Wallis DudhnathGuest Better to look at Layer 7 or Layer 3. TCAP is good with dialogues. Most analysers can decode at Layer 3 or 7. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Telecom Design’ is closed to new topics and replies.