Cellcomm has a well-equipped manufacturing facility supported by competent R&D, design and QC Team. Company has established relationships with major OEMs and Global Operators and holds approved supplier status with most of them.
CELLCOMM specializes in RF Passive and Active products and offers a wide range of product support for VHF, UHF, TETRA, CDMA, GSM, DCS, UMTS, Wi-Fi, WiMax and LTE.
Cellcomm manufacture and supplies various types for antennas which are ideal for indoor and outdoor applications. Quality and innovative designs are the speciality of Cellcomm antennas. Beam width and polarizations can be customized based on customer demands. Antennas are available for specific technologies like TETRA, CDMA, GSM, WCDMA, Wi-Fi, WiMAX, LTE and for wideband as well.
Types of antennas include:
Power dividers (splitter) and Power couplers are passive devices used in the field of radio technology. Their applications include indoor and outdoor coverage enhancement solutions and distributed antenna system.
Power divider and Power couplers are designed with high quality in terms of minimum insertion loss, isolation, power handling and directivity to achieve better system performance. Power dividers and couplers are available in different range of frequencies starting from 380 MHz to 6GHz.
Power divider Power divider
The connectivity from the transmitter to antenna is through RF feeders and connectors, which is essential for radio communication. Design and quality is important in terms of minimum losses, flexibility and types of dielectric material. Cellcomm provides different types of RF feeders which can be used based on the application and frequencies.
Point-of-Interface (POI) units combine multiple wireless communication systems to share a common distributed antenna system. POI consists of high quality combiners and duplex filters to achieve high system performance. POI is designed to use for all existing mobile technologies such as CDMA, GSM, WCDMA, Wi-Fi, & LTE. The POI equipment shall be one of the key components in the IBS project when it comes multi-operators using several different wireless communication systems. Key features of Cellcomm POI are very less insertion loss, good isolation between the bands and negligible passive intermodulation products.
Attenuators and Terminators are passive devices used to control or terminate the RF radiating power. The products are available in different models and power handling capabilities based on the design requirements.
Cellcomm range of combiners provide compact and cost effective solutions for combining different technologies in a common output port or multiple output ports. The special design provides excellent inter-band isolation, low insertion loss and good intermodulation performance. Combiners can be customized based on the requirements and are available in different combination of inputs, technologies, outputs and power handling capabilities.
Cellcomm designs a wide range of filters suitable for different application in radio frequency band between 800 to 2700 MHz. Latest design techniques provide compact design featuring quality and high performance filters. Filters can be customized to meet the specific band width requirements and can be silver plated to improve the intermod performance and reduce the insertion loss.
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Cellcomm’s Digi+Sprintflex is a digital transport platform supporting cellular and public safety technologies Optical cabling using the CPRI protocol.The digital radio supports low, medium and high power software defined remote units in a common platforrm up to 12x 3GPP bands. The power amplifier technology adopts Digital Pre-Distortion, allowing for a significant improvement in power consumption compared with analogue technology. Digi+Sprintflex is designed with the flexibility to support diffrent stages for distributing the signals to the slave units , the product consists of Access unit (AU),Expansion unit (EU) and remote Unit (RU). Multiple stage connectivity can support cascade , star and diasy chain topologies , cascade connectivity options enables to couple the radio signal source (BTS/e-NodeB) from multiple locations or to have maximum bands in to a single layer. |
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Repeaters are used to cover black spots of existing base stations or to extend the coverage at desired areas. Repeaters are easy to deploy and help in faster rollout. Repeaters help the mobile operator to optimize their network coverage area and the quality of service without changing the network parameters. Cellcomm provides customized site specific repeater solution for indoor and outdoor applications for all wireless technologies (TETRA, CDMA, GSM, DCS,, WCDMA, Wi-Fi, WiMAX & LTE). Cellcomm Repeater comes with high quality SAW (surface Acoustic Wave) filters and linear amplifier which amplifies the desired frequency band or bands with superior out of band rejection. Cellcomm produces customized movable and tunable Repeaters for any frequency bandwidth for a single technology or multiple technologies in single/multi-sub bands. Cellcomm repeaters are equipped with user friendly control and monitoring device or software which helps the installation engineer to perform easy installation and configuration. Cellcomm also offers centralized monitoring software which can monitor and control the repeater parameters and alarms in real time and the same can be integrated to the higher end Network Monitoring System (NMS). |
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Cellcomm Digital multi band repeater is designed by adopting SDR (software Define Radio) technology based on FPGA (Field Programmable Gate array) & DSP (digital Signal Processing) platform. FPGA & DSP platform enables the flexibility in frequency bands selection across the technologies (GSM900, GSM1800 & WCDMA2100) through software very easily at field without changing any hardware. Digital Multi-band repeater has designed with built in Modem to connect with a centralized Network Monitoring Software. Network Monitoring Software can control and monitor the repeaters operational features like gain, output power, frequency band allocations and real time alarms from the field. |
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Fiber optic repeater consists of a master unit and remote unit. master unit receives RF signal from BTS and converts to optic signal and transmits to the remote unit through fiber cable. remote unit receives the optic signal, converts back to the original RF signal after amplification and transfers to the service antenna. FOR is designed for both outdoor and indoor applications and the best suitable applications are for extending the coverage in large buildings (IBS), highways, tunnels and remote villages. FOR can be customized for single and multiple technologies. |
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FSR is an ideal solution that can address the network coverage in rural areas without increasing the BTS CAPEX and is cost effective compared to similar micro cell system. Installation is also much convenient and can be used in weak signal areas, highways, subways and remote villages. In those areas, FSR can replace the BTS to extend the coverage and maximize the capacity utilization of the remote base station. Frequency shifting repeater consists of a master unit and remote unit. The master unit is directly/wirelessly coupled to the base station, converts the original/work frequency to a different shift/link frequency and then forward the signal to remote slave units over the air by their transmission antennas. Remote units use transmission antenna to receive shift /link frequency from the master units and convert it to the original/work frequency, amplify the signal and then forward the signal to mobile station inside the target area through serving antenna. The distance between the master & remote unit can go up to 18 ~ 20 Kms with in the normal cell range, however by enabling the extended cell range option in the cell sector FSR master to remote distance can go up to 50 ~ 55 Km if LOS(Line of Site) is clear. Since the FSR is changing the frequency during transmission, the isolation requirement between donor & service antennas is not critical as in the case of conventional repeaters. So it is very easy for site survey and installation. The other advantage of FSR is that, we can use Omni directional antenna as a transmit antenna at the remote unit. |
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TOWER MOUNT BOOSTERS (TMB) Tower mount booster is a bidirectional amplifier to extend the coverage of a BTS. TMB is installed at the tower top and the output power is directly connected to the antenna using a short jumper. High power linear amplifier which amplifies the downlink and the low noise amplifier serves to improve the sensitivity of BTS to balance the link with extended cell coverage in the downlink path. This can help the wireless operator to maximize their existing cell capacity by extending the cell coverage. TMB also can be an ideal solution in the initial rollouts which can decrease the number of BTS to reduce/delay the CAPEX and for faster roll out. In case of a TMB failure, the by-pass function of the TMB helps to bypass the base station signals. Cellcomm TMB’s are available with high output power like 20 & 40 Watts in single or dual technologies. The system is designed for outdoor with compact profile which helps the installation much easier. TMB can be controlled locally or remotely by the help of OMT software or centralized OMC software. TMB also has got an external alarm option to integrate with BTS alarms which can be monitored from operator’s OMC. MCPA high Power Booster consists of MCPA in the downlink to extend the BTS coverage and low noise amplifier in the uplink path to balance the link with extended cell coverage. MCPA is specially designed and capable to amplify the multiple numbers of carriers without degrading the network performance. Feed forward technology and pre-distortions circuit provide highly linear output which can achieve -65 to-70dBc IMD. IMD suppression is most important when it comes to multiple carriers and high output power. MCPA has a built-in bypass circuit which in the event of any fault in the equipment triggers the bypass function without affecting the existing cell coverage. MCPA can be controlled and monitored locally and remotely through control software. MCPA also has an external alarm option to integrate with BTS alarms which can be monitored from operator’s OMC. MCPA’s are available in tower top and tower bottom model based on the application, output power, number of technologies and number of sectors. |
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TOWER MOUNT AMPLIFIERS (TMA)
Tower mount Amplifier is a directional amplifier to extend the uplink coverage of BTS. The unit is installed near the antenna at the tower top to improve the receiving sensitivity of the base station. The usage of TMA will help to improve the call success, drop call rates, call quality and extended handset battery life. TMA is designed to be installed in outdoor towers, walls or poles close to the antenna. By-pass circuit will be activated when DC power supply is switched off or when there is a fault in the system.
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Cellcomm Optical Bi-directional amplifier extends the coverage of any VHF network. The system is to support the continuous operating band or 25 kHz channel selection in the VHF band. The system provides flexible configurations up to eight (8) channels locally and remotely. Optical Bi-directional Amplifier is designed in a digital platform to support VHF simplex application by switching the uplink and downlink path based on the RF input detection using a built-in simplex controller. The major application is to extend the VHF radio coverage in tunnels by plugging the remote unit to extend the coverage with the help of radiating cable. The Fiber Optic BDA (FOR) system consists of an optical master unit (MU) and an optical remote unit (RU) and connects with a single-mode single core optic fibre cable. One master unit can support up to 16 remote units in a ring topology for fiber redundancy to extend the coverage in longer tunnels. The optical master unit receives signals from the user then the simplex controller triggers to switch the system towards the downlink mode and radiate, similarly when a remote unit receives signals from the user then it drives the master unit to switch into the uplink mode and simultaneously drives all other connected remote to radiate in downlink path. |
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Cellcomm wireless bi-directional amplifier extends the coverage of any VHF network. The system is to support the continuous operating band or 25 kHz channel selection in the VHF band. The system provides flexible configurations up to eight (8) channels locally and remotely. Wireless bi-directional Amplifier is designed in a digital platform to support VHF simplex application by switching the uplink and downlink path based on the RF input detection using a built-in simplex controller. The major application is to extend the VHF radio coverage in tunnels, basements, parking etc. |
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