Comba Telecom's services and coverage at the Dearborn County Hospital, United States

1. Healthcare
CASE STUDY
The Challenge
Similar to many hospitals, Dearborn County Hospital experienced cellular coverage issues. After
researching the market, DCH chose Comba Telecom, Inc. as their turnkey wireless solution
provider.
Dearborn County Hospital was expanded by 100,000 sq ft, which includes a four-story inpatient
bed tower, a new medical office building, housing for four hospital-based physician practices, a
sleep center, and an employee fitness center. The hospital management strives to provide the
best technology and communications in the new facility; however, they encountered challenges
on their wireless network.
“Like many hospitals around the United States we
encountered poor cellular coverage,” said Jim
Dillard, Senior Material Manager at the Dearborn
County Hospital. The biggest contributing factors
are typically the construction of the hospital
where the emitted radiation from X-ray machines
and similar equipment need to be kept as
isolated as possible. The end result is that unless
the hospital is located near a cell tower, cellular
coverage within
the hospital will often be nonexistent, which was also the case
for Dearborn County Hospital.
The demand for high speed data communication in 4G LTE
networks continues to grow rapidly. The growing use of wireless
in the hospital also dramatically increases the peak power
produced by the new modulation. Consequently, this makes the
DAS sensitive to PIM performance. A DAS with inferior PIM
performance will face serious issues in network reliability, data
rates, and capacities.
The Comba Total Solution
Comba worked closely with the hospital to provide a customized
solution design. The design aims to solve the cell phone
“As a busy hospital, we
really appreciate the
minimum construction
interruption and great
project punctuality.
We are very pleased with
the significantly improved
cell phone coverage and
wireless data speed. ”
Jim Dillard
Senior Material Manager
Dearborn County Hospital

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coverage problem, and meet the growing demand of high speed data and voice
communications. Comba’s modular design products give users the flexibility and potential for
future network upgrades.
The complete (DAS) Distributed Antenna System includes one Modular Bi-Directional Amplifier
(MBDA), one ComFlex DAS Master Unit (MU) and five ComFlex low powered Remote Units
(LRU), distributing radio frequency (RF) signals to 32 antennas strategically located throughout
the hospital. The Comba DAS system serves design scope of 700 lower ABC, 700 Upper C,
Cellular and PCS bands for both Verizon and AT&T, 4G LTE and 3G.
Unique to Comba, the ComFlex DAS and MBDA are designed with “industry first” Mini-DIN
connectors to achieve superior PIM performance. Together with Comba PIM rated passive
components and professional installation, the
hospital DAS PIM is less than -153dBc, measured
at 43dBm. This ensures maximum system
network reliability, data rates and capacities, in
turn maximizing the hospital’s return on
investment.
The ComFlex DAS and MBDA utilize Comba’s
web-based GUI, allowing technicians and
engineers to have easy access to the system, for quick and convenient commissioning after the
installation. With the Comba system’s remote capabilities, personnel can continue to monitor
the network and provide immediate support, with zero disruption to the hospital, any time
after the installation.
Comba Products
Comba MBDA - Modular Bi-Directional Amplifier
Comba ComFlex DAS – Distributed Antenna System
Comba PIM Rated Passive Components
Comba Indoor Antennas