Filter
Top Products
Not for Com
mercial
Use
E
r
i
cs
s
on M
obile Com
m
unicat
i
ons
A
B
Glossary 75
Scroll
pressing the left or right arrow key to move between the menus.
Select
scrolling to a menu then pressing the
YES key on the phone.
Semi-Duplex
In handsfree equipment, full duplex means that the connection is
open for both parties to talk simultaneously. Semi-duplex gives close
to, but not complete, duplex functionality.
Service Provider
a company that provides services and subscriptions to mobile phone
users.
Short Message Service
(or SMS) allows messages of up to 160 characters to be sent and
received via the network operator’s message centre to your mobile
phone. Messages are stored if the phone is off or out of reach ensur-
ing that they reach you. To use this service, it must be supported by
your network.
SIM card
Subscriber Identity Module card - a card that must be inserted in any
GSM-based mobile phone. 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 functionality.
SMS
see Short Message Service above.
Subscription
is the contract that you have with the service/network provider. To
use your phone, you need to have a subscription to a network. You
get a SIM (Subscriber Identity Module) card with your subscription.
The services included in your subscription depend on your choice of
operator and/or subscription. So some of the services and functions
described in this manual may not be accessible to you. If you want a
complete list of the services included in your subscription, please
contact your network operator.