C5621 and C33 User Guide
1/1553-KRD 131 24 Uen Rev D 2011-11-22
Ericsson AB 2011
37 (37)
Ericsson Confidential
SIM card
Subscriber Identity Module card – a card that must be
inserted in any GSM-based mobile terminal. It contains
subscriber details, security information and memory for
a personal directory of numbers. The card can be a
small plug-in type or credit card-sized, but both types
have the same functions.
SMS
Short Message Service. Allows messages of up to 160
characters to be sent and received via the network
operator's message center to a mobile phone.
UMTS
Universal Mobile Telecommunications System. 3G
network technology using WCDMA methods.
WCDMA
Wideband Code Division Multiple Access. A modulation
technique using a wide bandwidth (5MHz in the case of
UMTS). All terminals transmit in the entire bandwidth
and the signals from each are differentiated via the use
of unique codes assigned to each transmission.