Sierra Raven EDGE - Manual (Page 19)

Introduction to the Raven
Rev 3.0B Feb.08 15
address for your modem, you can use a Dynamic DNS service
(such as IP Manager) to translate your IP address into to a
domain name.
Caution: If you want to connect remotely to your Raven using TCP/
IP, the IP address given to your modem by your cellular provider
cannot be a private or internal IP address (such as a custom APN or
special private network) unless you are on the same network or inside
that network’s firewall (such as with frame relay).
EDGE Communication
GSM Networks use SIM cards which are smart cards
containing the account holder’s details. A SIM can generally be
moved from one device to another allowing for account porta‐
bility and flexibility.
EDGE
EDGE (Enhanced Data rates for GSM Evolution) provides end‐
to‐end packet data services with an enhanced connectivity
building on GPRS technology and using the established GSM
networks. EDGE provides higher transmission rates and better
transmission quality for data than GPRS. EDGE can carry data
at speeds typically up to 384 kbit/s in packet mode.
When EDGE is not available, your Raven will fall‐back to
GPRS for the connection to your cellular provider to provide
continued connectivity.
GPRS
General Packet Radio Service (GPRS) is packet‐switched with
many users sharing the same transmission channel, but only
transmitting when they have data to send. This means that the
total available bandwidth can be immediately dedicated to
those users who are actually sending at any given moment,
providing higher utilization where users only send or receive
data intermittently. GPRS provides speeds of 30–70 kbps with
bursts up to 170 kbps.