The HDLC Protocol Controller can be used as a D-channel interface in a digital line card comprised of multiple DNICs.
HDLC协议控制芯片也可以作为D通道接口，用在包含多个DNIC的数字线路卡上；
The HDLC Protocol Controller can be used as a D-channel interface in a digital line card comprised of multiple DNICs.
HDLC协议控制芯片也可以作为D通道接口，用在包含多个DNIC的数字线路卡上；
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