ZyXEL Omni TA 128 User Guide - Page 23
Front Panel Switch
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DTR - The data terminal ready LED lights up when the DTE or computer connected to the DTE Port indicates that it is ready for communication by raising the corresponding RS-232 signal. TX - The transmit data LED flashes when the DTE/Computer is transmitting data to the DTE Port of the TA128. RX - The receive data LED; lights up when the DTE/Computer is receiving data from the DTE Port of the TA128. Phone 1 - The phone 1 LED lights up when the POTS port 1 telephone/handset is off-hook. Phone 2 - The phone 2 LED lights up when the POTS port 2 telephone/handset is off-hook. Front Panel Switch When the TA128 is in command state, pressing the front panel button causes it to dial the default phone number pre-stored in the NVRAM. The default number pointer to the telephone directory is assigned by the AT*Dn command. When the TA128 is on-line, pressing the button will tear down the connection and bring it into command state. To restore the TA128 to its factory default settings and initiate the loop-back test, turn the power ON while pressing and holding the switch. Continue holding the switch for 3 to 5 seconds after turning the power ON. 11