Redhawk II GSM Modem Users Guide
Draft: 10/30/00
11
Part Number: 07100020 version 00B
© 2000 Xircom, Inc. All rights reserved.
All trademarks and copyrights are the property of Xircom, Inc.
Pin
Number
Signal
Name
Direction
Functionality
1
VIN
From CPE
Electrical power input to Redhawk II modem:
5.0 VDC to 28.0 VDC
2
GND
From CPE
Electrical power return for digital and analog
grounds.
Table 2: Power Connector Pin Out
Primary Serial Interface (SERIAL 1)
This serial I/O interface (RS-232) uses a DB-9 connector and supports auto baud capability from
300 bps to 19200 bps with hardware handshake flow control.
Pin
Number
Signal
Name
Direction
Functionality
Voltage
Level
1
DCD0_DS
To CPE
Data Carrier Detect 0. DCE Output signal. Active low. Main
serial interface data carrier detect signal. Connects to a DTE,
CD, Carrier Detect pin.
3 V
2
RX0_DS
To CPE
Receive data 0. DCE Output signal. Main serial interface
transmit data signal. During idle or reset, signal will be a logic
1. Connects to a DTE, RX, receive data pin.
3 V
3
TX0_DS
From CPE
Transmit data 0. DCE Input signal. Active low. Main serial
interface receive data signal. During idle or reset, signal will be
a logic 1. Connects to a DTE, TX, transmit data pin.
5 V or
3 V
4
DTR0_DS
From CPE
Data Terminal Ready 0. DCE Input signal. Active low. Main
serial interface data terminal ready signal. Connects to a DTE,
DTR, Data Terminal Ready pin.
5 V or
3 V
5
GND_IN
From CPE
Electrical power return for digital and analog grounds.
6
DSR0_DS
To CPE
Data Set Ready 0. DCE Output signal. Active low. Main serial
interface data set ready signal. Connects to a DTE, DSR, Data
Set Ready pin.
3 V
7
RTS0_DS
From CPE
Request-To-Send 0. DCE Input signal. Active low. Main serial
interface request to send signal. Connects to a DTE, RTS,
Request-To-Send pin.
5 V or
3 V
8
CTS0_DS
To CPE
Clear-To-Send 0. DCE Output signal. Active low. Main serial
interface clear to send signal. Connects to a DTE, CTS, Clear
to send pin.
3 V
9
RI0_DS
To CPE
Ring Indicator 0. DCE Output signal. Active low. Main serial
interface ring indicator signal. Connects to a DTE, RI, Ring
Indicator pin.
3 V
Table 3: Primary Serial Connector Pin Out
NOTE: The maximum length for the Primary Serial cable is 50 feet.