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问题 Similar the question I asked before in enter link description here, I also need a Log pcap for MAP_OPEN_REQ and MAP_OPEN_DELIMITER_REQ messages. As I found pcap files containing MAP/TCAP/SCCP protocols enter link description here and enter link description here, but there is no log Pcap for MAP_OPEN_REQ there. How can I get that? 回答1: You won't find MAP-OPEN and MAP-DELIMITER in the pcaps because they are not sent over the wire. These are common services/primitives used between the MAP

问题 I have installed the osmocom asn1c compiler, the aper-prefix branch, to obtain an implementation of the TCAP protocol. I have used the respective script to compile the ".asn" files. The C files are generated successfully, but when compiling the obtained C code, an error is raised, which is related to this line of code: #include <EXTERNAL.h> In fact, the file EXTERNAL.h is missing (seemingly, the EXTERNAL type is not supported by this compiler). Is anyone aware of this problem and a possible

问题 I'm writing an simulator (for learning purposes) for complete M3UA-SCCP-TCAP-MAP stack (over SCTP). So far M3UA+SCCP stacks are OK. M3UA Based on the RFC 4666 Sept 2006 SCCP Based on the ITU-T Q.711-Q716 TCAP Based on the ITU-T Q.771-Q775 But upon decoding TCAP part I got lost on dialoguePortion. TCAP is asn.1 encoded, so everything is tag+len+data. Wireshark decode it differently than my decoder. Message is:

问题 Can anyone tell me the actual difference between ISUP and ISDN call and how do we decide which one to use? Question is very basic but i always find difficult to understand. 回答1: ISDN is a set of standards for voice, video and data communications over traditional circuit switched networks. It includes standards for the protocols between the end devices (e.g. phone) and the switch in the public network and standards for the signalling between one switch and another in the public network. ISUP