31.5.02 03-S46 Safe- i 37 Eagle Am Engl, A31008-H4500-A1-4-7619

Safety Precautions

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Switch off in hospitals or in the vi- cinity of medical devices (e.g., pacemakers or hearing aids). Mobile phones can interfere with the function of these devices.

Always use the hands-free kit for calls while driving! (p. 97)

Mobile phones must be switched off at all times in an airplane. Pre- vent accidental activation. (p. 67)

Switch off near gas stations, fuel depots, chemical plants or blasting operations. Wireless phones can interfere with the op- eration of technical installations.

Do not use optic magnification devices to examine the active in- frared interface [Class 1 LED product (classified according to IEC 60825-1)].

The ring tone is reproduced through the earpiece.To avoid possible damage to hearing, first accept the call, then hold the phone to your ear.

SIM card may be removed. Cau- tion: small parts could be swal- lowed by children.

The voltage specified on the power supply must not be exceeded.

We recommend you use original Siemens batteries (100% mercu- ry-free) and charging devices.

Otherwise, considerable health risks and damage to the product cannot be excluded.

Neither the phone nor the battery (100% mercury-free) should be opened under any cir- cumstances. Changes to this de- vice are strictly prohibited, as they will invalidate the type ap- proval criteria required for opera- tion of the unit.

Please observe:

Dispose of used batteries and phones according to the legal regulations.

Wireless phones can interfere with the operation of nearby TVs, radios, and PCs.

We recommend you use only original Siemens accessories to avoid possible damage and en- sure that the phone complies with all relevant regulations.

Improper use invalidates the warranty!

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Siemens GSM 900, GSM 1900, TDMA 800, TDMA 1900 manual Safety Precautions, Please observe
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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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