Guides
MTP3 User Part Availability During LinkSet RestorationSignaling System No. 7 routes call control and database queries through a stack where MTP3 sits between the lower link layers and the user parts above. When…
SCTP multi-streaming benefits for hold-up MTP2 user trafficSCTP has quietly become the workhorse of modern signaling transport, replacing older MTP2 layers wherever operators push SS7 traffic over IP. For engineers…
ISUP cause code 23 in Australian mobile routingISUP cause code 23, formally called “exchange routing error”, indicates that a signalling exchange could not select or complete a valid route for the called…
Cross-Border Equipment Validation Through MAP Check-IMEIMobile device fraud costs Australian operators millions each year, with handset theft in Sydney, Melbourne, and Brisbane driving much of the demand for…
How to Use Packet Injectors for SS7 Red Team Security TestingPacket injectors help security teams examine how signalling infrastructure reacts to carefully controlled SS7 and SIGTRAN traffic. Used properly, they can…
How Reset Messages Shape SSP and STP Transaction ProcessingReset messages are essential control signals in Signalling System No. 7 (SS7). They clear stale call state, restore alignment between network elements and help…
SCCP Called Party Address Decoding: Nature of Address and DigitsEngineers in Sydney reading international transit traffic see direct consequences from a misread Called Party Address field: calls misroute or reach the wrong…
SIP-I vs SIP-T: interworking ISUP with next-generation networksAustralia's telecommunications landscape is shifting fast. Telstra has been progressively switching off its legacy PSTN and ISDN services, with copper…
Security Best Practices for SIGTRAN Firewalls and Access Control ListsSIGTRAN carries legacy SS7 signalling across IP networks, connecting telecom operators, mobile cores, service platforms and inter-carrier gateways. That shift…
SS7 Timers in ISUP: Tuning T1, T5, T7 and T14 for Reliable VoiceAustralia's telecommunications infrastructure stretches across a continent, linking exchanges in Sydney and Melbourne with remote switches in Kalgoorlie,…
