Telecom Security and Revenue Assurance

Where operators lose messaging revenue

A2P SMS is one of the few growing wholesale revenue lines for mobile operators, and it leaks in predictable ways:

• Grey routes: commercial SMS delivered through interconnects priced for person-to-person traffic.
• SIM boxes: bulk messages injected through local SIM cards so they look like subscriber traffic.
• Spoofing and faking: messages with manipulated origin addresses that bypass charging and trust.
• FlashCall: verification moved from billed SMS to unbilled missed calls on voice trunks.
• Reconciliation gaps: A2P traffic delivered under agreements but not fully billed.

The same paths are also used for phishing and fraud against subscribers. Our guide to SMS fraud types covers each one.

How the products fit together

1. Detect. The honeypot uses trap numbers to show which routes deliver into your network today, and through which originating networks.
2. Protect. The SMS firewall, SMPP firewall and signaling firewall enforce rules on live traffic.
3. Monetize. Blocked A2P traffic returns through paid agreements, and FlashCall monetization bills verification calls.
4. Assure. Revenue assurance audits reconcile what was delivered with what was billed.

No single tool catches every bypass. Honeypot evidence makes firewall rules more precise; firewall data shows what the honeypot should test next; audits show whether the revenue actually arrived.

Products

Product	What it does	Interfaces
SMS firewall	Inspects inbound SMS; blocks grey routes, spoofing and sender ID abuse	SS7/SIGTRAN, SMPP
SMPP firewall	Controls ESME binds, throughput, sender IDs and content on SMPP links	SMPP
Signaling firewall	Screens SS7, Diameter and GTP signaling against tracking, interception and fraud	SS7/SIGTRAN, Diameter, GTP
Honeypot	Trap numbers that reveal grey routes and SIM box termination	Test numbers on your network
Revenue assurance	A2P traffic audits and reconciliation	CDRs, firewall and partner data
FlashCall monetization	Detects, blocks or bills flash calls on voice trunks	Voice interconnects

Deployment models

Products run as software on the operator's premises or hosted, connected to the operator's STP or signaling gateway, SMSC and voice interconnects. Most engagements start with an assessment that measures current traffic before any blocking rule goes live, so the operator sees the expected impact on revenue and on legitimate traffic first.

Standards

Policies follow GSMA guidance, including FS.11 for SS7 interconnect security, FS.19 for Diameter, FS.20 for GTP, FS.12 for A2P SMS bypass and SG.22 for SMS firewall policies. See our guide to the GSMA SMS security documents.

Why Wise Network

We run international voice and SMS traffic ourselves and build the products that police it. That combination means we understand how bypass routes are assembled commercially, not only how they look in signaling traces. Our own route policy, direct and approved routes only, is the standard our products help operators enforce.