Sierra Wireless EV-DO - Manual (Page 40)

Hardware Installation of the PinPoint-E
Rev 3.0B Feb.08 35
connecting the modem to a hub or switch you should use a
straight through cable or use the uplink port on the hub or
switch with a cross‐over cable.
Tip: On some computers, the TCP receive window may be set to 16
kbytes. To optimize the throughput of your PinPoint-E, it is recom-
mended that you change the TCP window to 128 kbytes to 256 kbytes
using a TCP Optimizer.
Figure 4-4: Serial
The serial port can be connected directly to most computers or
other devices using a standard straight through cable. If you
have a DCE device, you will need a null modem or null
modem cable.
All local GPS (UDP encapsulated) reports will come over the
Ethernet connection. Raw GPS data can also be transmitted
across the serial port for applications which require COM
traffic. The serial port cannot be used to receive data from the
Internet. You can send data out to the Internet from the serial
port, but no data will be routed from the Internet to the serial
port.
Indicator Lights
When your PinPoint‐E is connected to power and an antenna,
there is a specific pattern to the lights to indicate its operation
mode.
Figure 4-5: PinPoint-E Indicator lights
• Chan (channel) ‐ Indicates the modem has acquired a
network channel.