31.5.02 06-S46 Body.fm i 37 Eagle Am Engl, A31008-H4500-A1-4-7619

78

Setup

 

 

 

 

 

 

 

 

§Menu§

Setup

Last 10 only

 

 

Security

(phone code protected)

 

 

select a function:

 

 

Outgoing calls are limited to

 

 

 

 

Babysitter

the call list (p. 51) of the last

 

10 dialed numbers.

 

(phone code protected)

 

This SIM only

©

Calls can be made only to a single,

user-defined phone number, which

(phone code protected)

is dialed by selecting and holding the

It is possible to use a different SIM

soft key. (For more information, see

when this setting is activated, but

page 24).

you will be prompted to enter the

 

Only ,

mobile phone code.

 

(PIN2 protected)

 

The dialing options are restricted to

 

numbers located on your Protected

 

SIM; new entries cannot be made. If

 

only area codes are entered, the

 

relevant phone numbers can be

 

added to these manually before

 

dialing.

 

Depending on whether the SIM phone book is stored on the SIM card or in the phone, PIN 2 or phone code are requested before the entries can be changed.

Page 82 Page 84
Page 83
Image 83
Siemens TDMA 1900 Only, Call list p of the last Dialed numbers Phone code protected, Calls can be made only to a single
Page 82 Page 84

GSM 900, GSM 1900, TDMA 1900, TDMA 800 specifications

Siemens is a renowned telecommunications equipment manufacturer known for its innovative solutions in mobile communication. Among its notable contributions are the TDMA 800, TDMA 1900, GSM 900, and GSM 1900 systems. These technologies have played a significant role in shaping mobile telephony, particularly during the late 20th century.

TDMA, or Time Division Multiple Access, is a digital transmission protocol that allows multiple users to share the same frequency channel by dividing the signal into time slots. The Siemens TDMA 800 operates in the 800 MHz frequency band, which is ideal for regional mobile communication. Its main features include improved call quality, greater capacity, and effective handover capabilities. This system was particularly popular in the United States, where it formed the backbone of early digital cellular networks.

On the other hand, the TDMA 1900 operates in the 1900 MHz band, catering to urban areas with higher population densities. This system further enhances voice clarity and offers faster data transmission speeds. Its key characteristics include support for features such as call waiting, caller ID, and enhanced voice privacy, making it suitable for modern telecommunication needs.

GSM, or Global System for Mobile Communications, is another critical technology developed by Siemens. The GSM 900 operates at 900 MHz and is one of the most widely adopted mobile standards globally. Its contributions to the communication landscape include superior frequency reuse, allowing for a greater number of simultaneous calls. The GSM 900 also supports various services beyond voice calls, including SMS (Short Message Service) and basic data transmission.

Meanwhile, GSM 1900, which functions in the 1900 MHz frequency band, is predominantly used in North America. This technology shares many features with GSM 900, but it accommodates a larger number of channels per frequency unit due to its higher frequency. The GSM 1900 system has been critical in facilitating the growth of mobile data services, providing a solid foundation for the evolution of mobile internet access.

Overall, Siemens' TDMA and GSM technologies have significantly influenced the development of mobile telecommunications. With features focused on capacity, flexibility, and quality, these systems established the groundwork for the advanced mobile networks we rely on today. Their legacy continues to be seen in the current generation of wireless technologies, highlighting the importance of innovation in the telecommunications industry.
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