Guardivia Telecom Security Knowledge Base
Answers to the questions operator teams actually search for
42 detailed answers across 12 topic areas, written for network, security, wholesale and revenue-assurance teams. Each page opens with a direct answer, then explains the mechanism, the detection method and the operator impact.
Topic hubs
Start with a topic
Each hub defines its subject, answers the common questions on the page itself, and links to the detailed articles beneath it.
SMS Firewall
17What an SMS firewall is, how it inspects traffic, how it differs from an SMSC, and how it fits into an existing operator network.
Open hub →SMPP Security
6Protecting application-layer messaging connections: binds, credentials, TPS limits, Sender IDs and abnormal ESME behaviour.
Open hub →SS7 and SIGTRAN Security
6Signaling-layer protection for SMS: Global Title filtering, SRI-SM behaviour, MAP operations and SIGTRAN environments.
Open hub →A2P Revenue Assurance
19Identifying commercial messaging, enforcing approved routes, measuring leakage, and proving the result to finance.
Open hub →Grey Routes and Bypass
8How commercial traffic reaches subscribers outside approved channels — and the evidence that exposes it.
Open hub →SIM Box and SIM Farm Fraud
5How SIM-based termination bypasses commercial routes, and the behavioural signals that expose it.
Open hub →Sender ID Security
5Registries, spoofing, variation attacks and the limits of sender validation as an anti-phishing control.
Open hub →SMS Honeypot and Route Testing
6Controlled test traffic to real SIMs on live networks, and what handset evidence can and cannot prove.
Open hub →FlashCall and Voice Verification
7Voice-based authentication, its effect on SMS OTP economics, and related automated calling abuse.
Open hub →Artificially Inflated Traffic
7Fabricated OTP and verification traffic, how it differs from genuine growth, and how to reduce it without breaking real logins.
Open hub →Smishing, Spam and Content Security
6Phishing over SMS, malicious URLs, flooding and the content controls that address them.
Open hub →AI and Traffic Intelligence
5Where behavioural analytics helps, where deterministic rules remain essential, and how enforcement stays under human control.
Open hub →All articles
Every detailed answer
Grouped by hub. These are the pages with full technical explanations rather than short answers.
A2P Revenue Assurance
- What is A2P SMS?
- What is A2P SMS monetization?
- How can an SMS firewall increase A2P revenue?
- What causes A2P SMS revenue leakage?
- How can a mobile operator increase A2P SMS revenue without increasing subscriber traffic?
- How can operators calculate revenue leakage from SMS grey routes?
- How do you identify A2P traffic being terminated as P2P SMS?
- How can an operator detect unauthorised international A2P termination?
- Why does A2P traffic drop after deploying an SMS firewall?
- How can operators distinguish legitimate traffic reduction from SMS bypass?
- How can operators identify which OTT platforms are generating A2P traffic?
- How can Sender ID analysis reveal unmonetized A2P traffic?
- How can an MNO establish an A2P traffic baseline before deploying a firewall?
- What KPIs should operators monitor after deploying an SMS firewall?
- How can operators measure the ROI of an SMS firewall?
- What causes sudden changes in OTP traffic volume?
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