ORBCOMM客户将能以更快的速度通过OG2卫星传输数据，并能通过未来的调制解调器发送更大的数据包。
ORBCOMM customers will be able to transmit data over the OG2 satellites at greater speeds and send larger data packets using future modems.
零调制解调器电缆是一种允许在两个串行端口之间发送数据的串行电缆。
A null modem cable is a serial cable that allows data to be sent between two serial ports.
使用零调制解调器连接时，发送线和接收线要交叉连接。
With a null modem connection, the transmit and receive lines are cross-linked.
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