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1. 1. 应急通信设备分类1.1 1.1 卫星通信设备卫星通信设备是应急通信中的重要组成部分，能够在地面通信网络瘫痪或无法覆盖的区域提供可靠的通信保障。卫星电
Alarm trigger activation explained for fire, security, industrial and emergency systems, covering trigger sources, signal validation, linkage rules, paging, vid...
Alarm Integration explained for industrial, security, fire and facility systems, covering alarm classification, video linkage, paging, dispatch, access control,...
VHF radio communication explained for aviation, maritime, emergency and dispatch projects, covering frequency use, radio-to-IP integration, deployment design, t...
5G is the fifth-generation mobile network built for higher capacity, lower latency, and massive device connectivity. Learn its main features, architecture, depl...
Learn what ATEX explosion-proof certification means, how ATEX 2014/34/EU and 1999/92/EC work, which Ex ratings and markings matter, and where ATEX-certified equ...
Learn what CE certification means, how CE marking works in the EU, which standards and directives apply, how protection ratings such as IP and EMC fit in, and w...
A DSS key is a programmable phone key used for direct extension access, BLF monitoring, speed dial, and call handling. Learn what DSS keys do, how they work, an...
Learn what FCC certification means, how FCC equipment authorization works, which standards and rule parts apply, how FCC-related protection criteria differ from...
An FXO gateway connects analog PSTN or PBX trunk lines to an IP phone system. Learn what an FXO gateway is, how it works, its key features, deployment basics, a...
An FXS gateway connects analog phones, fax machines, and other legacy endpoints to a SIP or IP PBX system. Learn what an FXS gateway is, how it works, its featu...
G.711 is a classic voice codec widely used in PSTN and VoIP. Learn how A-law and μ-law work, its audio benefits, bandwidth trade-offs, technical features, and c...
Learn what the G.722 codec is, how it works, its audio benefits, core technical features, and where it is used in VoIP, IP phones, conference systems, PBX platf...
