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探索安全和物联网行业的最新技术和创新。
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
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...
Learn what the G.729 codec is, how it works, its audio benefits, core technical features, and where it is used in VoIP, SIP trunks, IP PBX systems, gateways, an...
A GOIP gateway connects GSM or LTE mobile networks with SIP-based VoIP systems, enabling two-way voice and SMS routing for IP PBX integration, backup calling, m...
Zone 2 hazardous areas are locations where explosive gas, vapor, or mist is not likely during normal operation and, if it occurs, exists only briefly. Learn the...
Learn what a Zone 22 dust hazardous area is, how it is classified under IEC and ATEX rules, which Ex and IP markings matter, and where Zone 22 equipment is comm...
Zone 21 dust hazardous areas explained for combustible dust handling sites, covering classification, Ex tb markings, dust groups, surface temperature, IP limits...
Zone 1 hazardous areas are places where explosive gas atmospheres are likely to occur during normal operation. Learn the standards, Ex ratings, equipment markin...
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