User`s guide

Installation
Page 26
Connecting an RS-232 Device
The modem back panel provides a female, 25-pin RS-232 connector
that accepts an attached RS-232 device (see Figure 2-1 on page 10).
This connector accepts a standard connection to a DTE (RTU) that
conforms to the pin assignments shown under “RS-232 (RTU)
Interface” on page 34.
LEDs
The front panel of the modem provides the LEDs shown in Table 2-7.
Table 2-7. Modem LEDs
LED Color Description
PWR Green Power Input
RTS Yellow Request To Send
CTS Yellow Clear To Send
TxD Yellow Transmit Data
RxD Yellow Receive Data
DCD Yellow Carrier Detect
DSR Yellow Data Set Ready
(Modem Ready)
ALB Red* Analog Loopback
DLB Red* Digital Loopback
* When the modem is in remote loopback, both the ALB
and DLB LEDs go ON.