Raymar RT20 Series, Быстрый старт

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2: Introduction
Raymar RT20xx Series Quick Start Guide
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2 Introduction
This configuration guide explains how to set up and configure a 3G connection on a
Raymar RT20xx Series router.
3G is the third generation of mobile phone standards and technology. It is based on the
International Telecommunication Union (ITU) family of standards under the International
Mobile Telecommunications programme, IMT-2000.
3G and 4G technologies enable network operators to offer users a wider range of more
advanced services while achieving greater network capacity through improved spectral
efficiency. Services include wide-area wireless voice telephony, video calls, and
broadband wireless data, all in a mobile environment.
The RT20xx Series can contain either a 3G or 4G wireless modem. The modem together
with a SIM card establishes a WAN connection to the Internet or private network.
Data bearers are frame protocols that transport data streams. The GSM (3G) modem
supports GPRS, Edge, HSDPA, HSUPA, UMTS and CSD. The 4G modem supports 4G
frequencies and fails over to 3G, GPRS and EDGE technologies.
2.1 4G LTE
4G LTE is the fourth generation of mobile communication technology standards. It is a
successor to 3G and provides greater bandwidth.
2.2 GPRS
GPRS (General Packet Radio Service) uses packet-switched technology to transmit small
bursts of data. The 3G or 4G modem on the RT20xx Series supports multi-slot class 6,
which allows a maximum data rate of 384Kbps class 3. The maximum data rate available
to the 3G or 4G modem depends on provisioning by the network operator.
2.3 HSPA+
High-Speed Packet is an improvement on UMTS with achievable download
speeds of 21Mbps
2.4 HSDPA
HSDPA (High-Speed Downlink Packet Access) uses circuit-switched technology to
transmit data at speeds of up to 7.2Mbps.
2.5 HSUPA
HSUPA (High-Speed Uplink Packet Access) is a 3G mobile protocol with uplink speeds of
5.76Mbps
2.6 UMTS
UMTS (Universal Mobile Telecommunications System) is a third generation technology
providing higher transfer rates.
2.7 EDGE
EDGE uses the same frequencies as GPRS but offers better speeds. It is used when the
signal strength for 3G or 4G is not sufficient.