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HECL installs India's first GSM & CDMA service Coverage for Delhi Metro
DEC 2004
Himachal Exicom Communications Limited (HECL) has installed GSM & CDMA service Coverage for Delhi Metro (DMRC) in the Station Building & Tunnel for first metro section from Vishwa Vidyalaya (Delhi University) to Kashmere Gate (ISBT) of 4Km tunnel length. The metro service in this section was inaugurated by Prime Minister Mr. Manmohan Singh on December 19th.
THE ECONOMIC TIMES SATURDAY, DECEMBER 18, 2004
YOUR CELL WON'T LOSE SIGNAL AT METRO STATIONS
Mobile phones now work in underground metro stations and tunnels. Delhi Metro Railway Corporation and their contractors working in underground stations and tunnels can now communicate while working underground. Himachal Exicom Communications Limited (HECL), a Group Company of HFCL commissioned their underground GSM communication system to enable persons in underground stations and tunnels to communicate with the outside world.
Mobile networks generally do not cover underground subways and tunnels. To overcome this problem, Himachal Exicom installed underground Communication Systems under initiative of DMRC and GSM Operators in Delhi-Airtel, Hutch, Idea and MTNL. "Such systems are not available in many world metros and this technology is being implemented first time in India by Himachal Exicom in collaboration with WRI who has a vast experience in this field and have installed similar systems in other countries, says Y.S. Choudhary, Managing Director, Himachal Exicom.
GSM System uses POI equipment to combine signal from all four Operators and uses Optical Fibre Repeater Technology to distribute the signals to various stations and tunnels. Leaky co-axial cable is used for tunnel coverage and Passive Distribution System to cover platforms and subways. Thus, if you are traveling in Metro, whether you are on station or inside the tunnel in the train, you are always connected to the GSM Mobile Network.
Himachal Exicom is also installing another similar system for CDMA Operators - MTNL, Reliance and Tata which will enable CDMA subscribers also to have similar facility while traveling in underground Metro. CDMA system combines signals from their BTS installed at each station using POI equipment and uses leaky co-axial cable for tunnel coverage and Passive Distribution System for platform and subway coverage. Both GSM and CDMA systems provide coverage in both 900 MHz and 1,800 MHz. bands and the Company claims special precautions have been taken to ensure there is no interference between two systems.
HECL AWARDED CONTRACT BY DELHI METRO FOR GSM COVERAGE
MARCH 2004
Himachal Exicom Communications Limited (HECL) has been awarded the contract by Delhi Metro (DMRC) for providing GSM Coverage in the Station Building & Tunnel for first metro section from Vishwa Vidyalaya (Delhi University) to ISBT of 4Km tunnel length. DMRC provides metro rail services in India's capital -Delhi.
The
contract has been awarded after detailed techno commercial evaluation
by a Joint Working Group (JWG) comprising
of GSM operators- Idea Cellular Ltd., Hutchison Essar Telecom Ltd.,
Bharti Cellular Ltd. and MTNL.
Limited
tender for this project was invited by the JWG in the month of October
2003 from five companies. HECL participated in collaboration with Wuhan
Hongxin Telecommunication Technologies Co. Ltd., a WRI
group company specializing in GSM and CDMA repeater solutions. |