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July 15, 2024

I have been using call flooders for at least a few years against scammers. Unfortunately, it’s virtually impossible for me to use a call flooder and here’s why. This diminishing effectiveness can be primarily attributed to the proactive measures taken by Session Initiation Protocol (SIP) providers, who have begun to block spoofed numbers and impose limitations on channel availability. In understanding why call flooding has become increasingly ineffective, it is essential to delve into the workings of SIP providers, the significance of trunks and channels, and the ramifications of these measures on the practice of call flooding.



To begin with, a SIP provider, short for Session Initiation Protocol provider, is an entity that offers SIP trunking services, allowing users to make voice calls over the internet rather than traditional telephone lines. SIP is a signaling protocol widely used for initiating, maintaining, and terminating real-time sessions that involve video, voice, messaging, and other communications applications. SIP providers act as intermediaries between users and the Public Switched Telephone Network (PSTN) or the Internet, facilitating communication by converting analog voice signals into digital data packets.



In the context of SIP trunking, the terms “trunks” and “channels” hold significant importance. A trunk, in telecommunications, refers to a communication line or link designed to carry multiple signals simultaneously, typically between two switching centers. Trunks enable the establishment of connections between different endpoints, allowing for the transmission of voice, data, or video traffic. Within a SIP trunk, channels represent the capacity for concurrent calls that can be supported by the service. Each channel equates to one simultaneous call that can be made or received.



Now, let’s explore why call flooding, a tactic reliant on inundating targets with a barrage of simultaneous calls, is thwarted by the practices of modern SIP providers. Firstly, many SIP providers have implemented measures to combat the use of spoofed or falsified caller identification information. By verifying the legitimacy of caller IDs and blocking calls originating from suspicious or unauthorized sources, these providers mitigate the effectiveness of call flooding tactics that rely on concealing the true origin of calls.



Secondly, SIP providers often impose limitations on the number of channels available to users, particularly in the context of affordable or standard service plans. This restriction on channel availability directly impedes the execution of call flooding schemes, as perpetrators require access to a substantial volume of channels to generate a significant impact. Without access to an unlimited supply of channels, orchestrating large-scale call floods becomes impractical and financially unfeasible for malicious actors.



Moreover, the advancement of call analytics and monitoring technologies enables SIP providers to detect anomalous call patterns indicative of call flooding attempts. Through the analysis of call frequency, duration, and other parameters, providers can swiftly identify and mitigate suspicious activity, thereby safeguarding their networks and users from the disruptive effects of call flooding campaigns.



In conclusion, the waning effectiveness of call flooding can be attributed to the proactive measures adopted by SIP providers, including the blocking of spoofed numbers and the imposition of limitations on channel availability. By bolstering the security and integrity of their networks, SIP providers mitigate the threat posed by call flooding tactics, thereby preserving the reliability and trustworthiness of voice communication services. As telecommunications continue to evolve, it is imperative for providers to remain vigilant and adaptive in safeguarding against emerging threats, ensuring the continued resilience of global communication infrastructure.



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