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⇤ ← Revision 1 as of 2008-10-04 12:50:40
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| = GSM [http://www.heliostelecom.com/eproducts_detail.asp?id=87 RF Repeater] = | = GSM = |
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| [http://www.heliostelecom.com/eproducts_detail.asp?id=87 [http://www.heliostelecom.com/eproducts_detail.asp?id=87 RF Repeater]s] system is designed to solve problems of weak mobile signal, which is much cheaper than adding a new Base Station (BTS). Main operation of [http://www.heliostelecom.com/eproducts_detail.asp?id=87 [http://www.heliostelecom.com/eproducts_detail.asp?id=87 RF Repeater]s] system is to receive low- power signal from BTS via radio frequency (RF) transmission and then transmit the amplified signal to the areas where network coverage is inadequate. And the mobile signal is also amplified and transmitted tothe BTS via the opposite direction. |
[http://www.heliostelecom.com/eproducts_detail.asp?id=105 GSM] dates to the 1980s, when analog cellular systems in Nordic countries experienced rapid growth that resulted in the development of a new digital cellular standard. After five years of effort, 13 network operators and administrators signed a charter for the standardization of GSM. At that time, GSM was referred to by its French name, Group Special Mobile, but it is now known on a worldwide basis as Global System for Mobile Communications. |
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| The European version of GSM operates in the [http://www.heliostelecom.com/eproducts_detail.asp?id=105 900MHz band], which was avilable in countries that are members of the European commission. Unfortunately, the 900MHz band in the United States was not available, so the [http://www.heliostelecom.com/eproducts_detail.asp?id=105 1900MHz band] is used by GSM personal communications system in the United States. |
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| According to your requirement for working frequency, you can choose either type of [http://www.heliostelecom.com/eproducts_detail.asp?id=87 [http://www.heliostelecom.com/eproducts_detail.asp?id=87 RF Repeater]s]: Band Selective [http://www.heliostelecom.com/eproducts_detail.asp?id=87 [http://www.heliostelecom.com/eproducts_detail.asp?id=87 RF Repeater]s] System: to amplify all signals in the whole band (Bandwidth is customized) Wireless Channelized [http://www.heliostelecom.com/eproducts_detail.asp?id=87 [http://www.heliostelecom.com/eproducts_detail.asp?id=87 RF Repeater]s] System: to amplify only the signals transmitted by the customized 1 or 2 or 4 or 6 or 8 channel (A narrow band with customized central frequency) Features: 1. Comply with relevant regulation spectrum usage 2. Aluminum-alloy casing with IP65 protection and compact design, cool system without fan 3. ALC and AGC to ensure stable operation 4. Easy to install on wall or pole 5. Highly selective channel selector can process 1 or 2 or 4 or 6 or 8 channels simultaneously 5. Adopting filter with highly selectivity and low insertion loss eliminates interference between uplink and downlink 6. 2 RS-232 ports provide links to laptop for local test or to built-in wireless modem for communication with the NMS 7. High gain linear power amplifier technique with reliable performance Application: To expand signal coverage of fill signal blind area where GSM signal is weak or unavailable. 1. Outdoor: Airports, Tourism Regions, Golf Courses, Tunnels, Factories, Mining Districts, Villages, …… 2. Indoor: Hotels, Exhibition Centers, Basements, Shopping Malls, Offices, Packing Lots, …… |
GSM represents a TDMA version of [http://www.heliostelecom.com/eproducts_detail.asp?id=105 PCS]. As a digital technology, voice is first compressed using a hybrid coder at approximately 13kps before the data is modulated. With this digital technolgy, you can connect a data source directly to a GSM cell phone without the use of a modem. However, the highest data rate that you can expect to obtain will be approximately 14.4kbps. |
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| Tags: [http://www.heliostelecom.com/eproducts_detail.asp?id=87 RF Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=87 GSM Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=87 CDMA Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=91 UMTS Repeater] | Wireless Solutions | Wireless Network Optimization |
Tags: [http://www.heliostelecom.com/eproducts_detail.asp?id=105 RF Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=105 GSM Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=105 CDMA Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=105 UMTS Repeater] | Wireless Solutions | Wireless Network Optimization |
GSM
[http://www.heliostelecom.com/eproducts_detail.asp?id=105 GSM] dates to the 1980s, when analog cellular systems in Nordic countries experienced rapid growth that resulted in the development of a new digital cellular standard. After five years of effort, 13 network operators and administrators signed a charter for the standardization of GSM. At that time, GSM was referred to by its French name, Group Special Mobile, but it is now known on a worldwide basis as Global System for Mobile Communications.
The European version of GSM operates in the [http://www.heliostelecom.com/eproducts_detail.asp?id=105 900MHz band], which was avilable in countries that are members of the European commission. Unfortunately, the 900MHz band in the United States was not available, so the [http://www.heliostelecom.com/eproducts_detail.asp?id=105 1900MHz band] is used by GSM personal communications system in the United States.
GSM represents a TDMA version of [http://www.heliostelecom.com/eproducts_detail.asp?id=105 PCS]. As a digital technology, voice is first compressed using a hybrid coder at approximately 13kps before the data is modulated. With this digital technolgy, you can connect a data source directly to a GSM cell phone without the use of a modem. However, the highest data rate that you can expect to obtain will be approximately 14.4kbps.
Website: http://www.heliostelecom.com Company Name: Xiamen Helios Telecom Equipment Manufacture Inc. Department: Network Optimization Department
Tags: [http://www.heliostelecom.com/eproducts_detail.asp?id=105 RF Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=105 GSM Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=105 CDMA Repeater] | [http://www.heliostelecom.com/eproducts_detail.asp?id=105 UMTS Repeater] | Wireless Solutions | Wireless Network Optimization