The operate/standby switch may, for example, be the accessory position on a vehicle ignition switch. In order to minimize the acquisition time of the GPS module in the
Refer to the operation notes for details of operation/shutdown modes.
7.3 Connecting the serial data cable
The modem serial data port is a standard DB9 female connector configured as Data Communication Equipment (DCE) and is wired as per the table below.
DB9 Pin | Signal | Name | Direction |
1 | DCD | Data Carrier Detect | Modem PC |
2 | RxD | Received Data (by DTE) | Modem PC |
3 | TxD | Transmitted Data (by DTE) | PC Modem |
4 | DTR | Data Terminal Ready | PC Modem |
5 | GND | Signal Ground |
|
6 | DSR | Data Set Ready | Modem PC |
7 | RTS | Request To Send | PC Modem |
8 | CTS | Clear To Send | Modem PC |
9 | RI | Ring Indicator | Modem PC |
The DTR signal (pin 4) is used for modem operation/standby control - refer to the operation notes for details.
Serial data ports on most computer equipment are configured as Data Terminal Equipment (DTE) with a DB9 male connector. A standard serial data cable will allow for direct connection of the modem to most computer and terminal equipment. In some cases it may be necessary to insert a “null modem” or “gender changer” in the serial data line in order to correctly connect between the devices.
7.4 Mounting and attaching the cell antenna
The antenna used with the
In order to comply with FCC regulations the antenna used with the
The modem antenna connector is a standard SMA female type that requires the antenna cable to use a male SMA connector. The
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