User guide

Raven EDGE/GPRS for Cingular - User Guide, version 2.31 122
Frequently Asked Questions and Technical Support
mounted antenna can be placed in locations where the simple, short dipole antenna connected
directly to the Raven may not perform at all.
Your Raven is designed to work either with DC (commo
nly used in vehicles) or with an AC
adapter (standard wall outlet in the US, Canada, and most other countries). The input voltage is
9VDC to 28VDC with an input current from 90mA to 350 mA.
If the modem is provided an inadequate power supply the following symptoms might be experi-
enced:
• Modem will constantly power cycle while attempting to register
• Modem will register but will power cycle when data is transmitted/received
• Modem won’t power on at all.
If these symptoms occur, verify the power supply meets the above mentioned criteria. If an AC
adapte
r is being used; verify it is intended for the AirLink product in question.
It is possible to use a portable battery for your AirLink modem, however, you most likely need to
make the connector
from the battery to the
modem yourself. The battery also needs to have enough
power to be able to handle the power consumption of the modem.
You can contact AirLink Support for a guide on how to use your AirLink modem with a portable
batt
ery
.
The Raven’s IP Addresses and Local Networking
On Cingular’s network, for security reasons, some accounts set up to be restricted to communica-
tion only from other devices on their network, called a Res
tricted IP or a Private IP. If you had two
modems on Cingular’s network, they could communicate, but your computer, not using Cingular as
an ISP can’t. You could normally still access the Internet using your Raven’s restricted or private
IP because the modem would use a proxy or gateway on Cingular’s network.
Note: When using a cable with an antenna, there is a dB loss over the distance of
the cable. It is possible to lose the full gain of an antenna while using a long cable
to the modem.
What do I need to power my Raven ?
Caution: If you previously used AirLink CPDP modems, you may have older
power supplies that provide inadequate power and will cause the above mentioned
symptoms.
Can I use a portable battery to power my Raven ?
Why Can’t I reach my Raven from the Internet? What is a Restricted or
Private IP?