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目前國內(nèi)大部分電力專網(wǎng)都已建有SDH光環(huán)網(wǎng),它具有自愈環(huán)功能,當(dāng)一端光纖線路中斷了還可以從另外一端將數(shù)據(jù)傳輸過去。但并不是每一個SDH設(shè)備都處于環(huán)網(wǎng)里,就好比一些省市地域廣闊,電力通信線路比較長,某一些變電站形成自愈環(huán)比較困難,不但投資大,需要的光纜資源多,…
2024-5-25 22:02:06[未知IP0801]網(wǎng)友
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2024-5-25 21:30:58[未知IP0801]網(wǎng)友
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