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据《Communications》1988年4月刊报道:由Norcomm公司推出的NC—105数字编码静噪编/解码器是唯一的专为静噪控制应用而设计的信号产品。这种产品通过150字段可编程序码能与莫托罗拉的DPL、通用电气的DCG系统以及微处理机电路兼容,
According to the April 1988 issue of Communications, the NC-105 Digital Coding Silencer / Decoder by Norcomm is the only signal product designed specifically for Silencing Control applications. This product is 150 fields programmable code with Motorola’s DPL, GE’s DCG system and microprocessor circuitry compatible,