Number Range 400 for Sales Calls: an Operator’s Guide (BOE 2026)
In an earlier article we explained what the 400 prefix for commercial calls is and why it affects any user who receives…
Category: Telco
Rustisk: what if Asterisk were written in Rust?
Rustisk is an experiment that rewrites Asterisk in Rust: over a million lines of C turned into ~204K of Rust, with its own SIP stack, memory safety and SIP 2-5x faster. Promising, but still far from production. We take a look.
INCOMING SIGNAL
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Are you a VoIP operator? Spain’s new customer service law requires a 24/7, 365-day support phone line
What the new Spanish Customer Service Law requires from telecommunications operators: human support, resolution within 15 working days, and 24-hour support for service outages.
The State of IP Telephony and VoIP in 2026: Between Artificial Intelligence and Free Software
The other day, someone asked in Sinologic’s Telegram channel whether we were still working with IP telephony or if everything was now…
The 5 Changes Every Operator Must Know About the New Ministerial Order TDF/149/2025
If you are an operator or work in communications, you are likely aware that on Saturday, February 15, the Ministerial Order TDF/149/2025…