Guides
How to Detect STP Route Oscillation with Transfer Controlled MessagesIn legacy PSTN cores, signalling depends on quiet MTP3 decisions. When a link set or Signal Transfer Point cluster flaps between reachable and unreachable, the…
Secure MAP Roaming with SS7 Firewalls: Filtering Operations by ClientMobile roaming depends on MAP messages travelling between home and visited networks through SS7 or SIGTRAN infrastructure. That connectivity supports location…
How SS7 And DNS Work Together In ENUM Number PortabilityENUM connects telephone numbers with Internet addressing by converting an E.164 number into a DNS query. In a voice network, this can help determine whether a…
MTP2 Timer Settings for Reliable SS7 Link SetupMTP2 timers control how an SS7 signalling link establishes, proves its transmission path, detects failure, and returns to service. Correct values help prevent…
SS7 over dark fibre backbones for T1 and E1 transportDark fibre provides an unlit optical path that carriers, utilities and large enterprises can equip with their own transmission systems. In legacy and…
Debugging SCCP Return Causes 6 and 7 with a Signaling AnalyzerSCCP return causes 6 and 7 often appear together during investigations because both indicate that a message failed to reach its intended destination. They do…
ISUP Call Setup With ACM and ANM ExplainedIn an ISDN User Part (ISUP) call, signalling messages move through the SS7 network before speech or media is established. The Initial Address Message (IAM)…
How NAT Shapes SCTP Associations in SIGTRAN NetworksNetwork Address Translation (NAT) changes how private IP networks communicate with public or carrier-facing infrastructure. In SIGTRAN, this matters because…
SIGTRAN SUA as an alternative to SCCP for IP-based applicationsAcross Australian carrier networks from Brisbane exchanges to Melbourne cores, the move toward IP-based signalling has reshaped how transaction services are…
TP2 Alignment Procedures: Starting Up a New Signaling LinkThe Message Transfer Part layer 2 sits between the physical transmission of bits and the network layer functions that route signaling messages across a PSTN or…
