Operation Manual

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14
Troubleshooting
W-CDMA as the underlying air interface,
is standardized by the 3GPP, and is the
European answer to the ITU IMT-2000
requirements for 3G cellular radio systems.
To differentiate UMTS from competing
network technologies, UMTS is sometimes
marketed as 3GSM, emphasizing the
combination of the 3G nature of the
technology and the GSM standard which it
was designed to succeed.
WCDMA
W-CDMA (Wideband Code Division Multiple
Access) is a type of 3G cellular network.
W-CDMA is the higher speed transmission
protocol used in the Japanese FOMA system
and in the UMTS system, an advanced
3G system, designed as a replacement for
the ageing 2G GSM networks deployed
worldwide. More technically, W-CDMA is
a wideband spread-spectrum mobile air
interface that utilizes the direct sequence
Code Division Multiple Access signaling
method (or CDMA) to achieve higher
speeds and support more users compared
to the older TDMA signaling method of
GSM networks. W-CDMA is a competitor to
CDMA2000.
FDD 1
The FDD 1 (Frequency Division Duplex
1 (FDD, W-CDMA)) is one of the UMTS
frequencies, their Paired uplink and downlink
frequencies are 1920-1980 and 2110-2170
MHz, channel spacing is 5 MHz and raster is
200 kHz. An Operator needs 3 - 4 channels
(2x15 MHz or 2x20 MHz) to be able to build
a high-speed, high-capacity network.
SMS
Short Message Service (SMS) is a service
available on most digital mobile phones
(and other mobile devices e.g. a Pocket PC,
or occasionally even desktop computers)
that permits the sending of short messages
(also known as text messages, or more
colloquially SMSes, texts or even txts)
between mobile phones, other handheld
devices and even landline telephones.
MMS
Multimedia Messaging Service (MMS) is a
standard for telephony messaging systems
that allow sending messages which include
multimedia content (images, audio, video,
rich text) and not just text messages as in
Short message service (SMS).
PIN2
PIN2 is a security code that you can obtain
from your network operator.
IMEI
IMEI stands for International Mobile.
Equipment Identifier and is a number that’s
unique to your phone.
WAP
Wireless Application Protocol (WAP) allows
you to access information and entertainment
services.
GPRS
General Packet Radio Service (GPRS) is
a mobile data service available to users of
GSM and D-AMPS mobile phones. GPRS
data transfer, with throughput rates of up to
40 kbit/s, is typically charged per megabyte
of transferred data independently of the user
actually has transferred data.