Western Telematic SRM-100 - Manual (Page 7)

2. Unit Description
2.1. Front Panel
À ON Indicator: Lights when power is applied to the unit.
Á RDY: Flashes to indicate that the unit is ready to receive calls or enter the Command
Mode.
 PASS: Lights when a caller has entered a valid password and has been allowed to access
the connected device.
à DCD: (Data Carrier Detect) Lights when the DCD signal is high.
Ä RXD: (Receive Data) Lights when the RXD signal is high.
Å TXD: (Transmit Data) Lights when the TXD signal is high.
Æ RTS: (Request to Send) Lights when the RTS signal is high.
Ç CTS: (Clear to Send) Lights when the CTS signal is high.
È DTR: (Data Terminal Ready) Lights when the DTR signal is high. Note that the DTR
signal must be high in order for the modem to communicate. If the DTR signal is low,
the SRM-100 will prompt callers to enter a password, but will disconnect when a valid
password is entered.
2-1
Figure 2.1: Front Panel (Not to Scale)