# Knowledge Base

> Articles on Turkish logging and e-signature law, GPON, fiber budget calculations, wireless link planning and IoT protocols.

- [Turkish Law 5651: Logging Obligations for Public Wi-Fi Providers](https://internetten.com.tr/en/knowledge-base/turkish-law-5651-logging-obligations.md): What hotels, cafés, schools and malls in Türkiye must log under Law 5651: IP allocation records, daily integrity values, 2-year retention, penalties and KVKK.
- [PTP and PTMP Wireless Link Planning: Fresnel Zone and LOS](https://internetten.com.tr/en/knowledge-base/ptp-ptmp-wireless-link-planning-fresnel-zone.md): Plan PTP and PTMP wireless links: 5 GHz vs 60 GHz, Fresnel zone formula and 60% clearance rule, link budget, RSSI/SNR targets, antenna choice and site surveys.
- [Omnichannel Customer Communication with an AI Assistant](https://internetten.com.tr/en/knowledge-base/omnichannel-customer-communication-ai-assistant.md): What omnichannel communication means, WhatsApp Business API vs app, unified inbox, AI assistants grounded in CRM data via tool calls, voice bots and privacy.
- [ISP Subscriber Management: RADIUS, PPPoE, BNG, CGNAT, TR-069](https://internetten.com.tr/en/knowledge-base/isp-subscriber-management-radius-pppoe-bng.md): How ISP subscriber management works in practice: RADIUS AAA, PPPoE sessions, BNG/vBNG, CGNAT logging, TR-069 CPE management, billing and BTK reporting.
- [IoT Protocols Compared: LoRaWAN, NB-IoT, Modbus and MQTT](https://internetten.com.tr/en/knowledge-base/iot-protocols-lorawan-nb-iot-modbus-mqtt.md): LoRa vs LoRaWAN, NB-IoT, Modbus RTU/TCP and MQTT compared by range, power and data rate, with protocol choices for energy monitoring, greenhouses and livestock.
- [Guest Wi-Fi Legal Requirements in Türkiye: Hotels & Cafés](https://internetten.com.tr/en/knowledge-base/guest-wifi-legal-requirements-turkey.md): Guest Wi-Fi rules for hotels and cafés in Türkiye: Law 5651 logging, KVKK privacy notices and consent, user authentication methods and hotspot architecture.
- [GPON vs XGS-PON: Speeds, Wavelengths, OLT and ONU Explained](https://internetten.com.tr/en/knowledge-base/gpon-vs-xgs-pon-olt-onu-explained.md): GPON (ITU-T G.984) vs XGS-PON (G.9807.1): line rates, wavelengths, optical classes, split ratios, OLT/ONU choices and how both coexist on one ODN.
- [Fiber Optical Power Budget Calculation: A Worked PON Example](https://internetten.com.tr/en/knowledge-base/fiber-optical-power-budget-calculation.md): Calculate a fiber optical power budget: attenuation per km, connector and splice loss, splitter loss table, GPON B+/C+ classes, margin and a worked example.
- [Electronic Signatures in Türkiye: Law 5070, NES and ID Cards](https://internetten.com.tr/en/knowledge-base/electronic-signature-law-5070-turkey.md): When is an e-signature equal to a wet signature in Türkiye? Law 5070, qualified certificates (NES), Turkish ID card signing, PAdES levels and exceptions.
- [Centralized Syslog: Protocol, Architecture and Log Management](https://internetten.com.tr/en/knowledge-base/centralized-syslog-log-management.md): How centralized syslog works: RFC 3164 vs 5424, UDP/TCP/TLS transport, facility and severity, collector architecture, cloud vs on-prem, retention and SIEM.

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