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- Sonet . telecommunications - synchronous optical network - payload mappings
電信.同步光纖網(wǎng) - Sonet . telecommunications - synchronous optical network : physical layer specifications
電信.同步光纖網(wǎng) - Sonet . telecommunications - synchronous optical network - tandem connection maintenance
電信.同步光纖網(wǎng) - Sonet . telecommunications - synchronous optical network - automatic protection switching
電信.同步光纖網(wǎng)絡(luò) - Synchronous optical network , sonet
同步光學(xué)網(wǎng)絡(luò) - Sonet synchronous optical network
同步光纖網(wǎng)絡(luò) - Sonet : synchronous optical network
同步光網(wǎng)絡(luò) - Synchronous optical network sonet
同步光網(wǎng)絡(luò) - Sonet synchronous optical network
同步光纖網(wǎng) - Synchronous optical networking
同步光纖網(wǎng)絡(luò)