CommScope ION-M7P, Руководство пользователя

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2 Introduction
Page 15
2. INTRODUCTION
2.1. PURPOSE
Cellular telephone systems transmit signals in two directions between a base
transceiver station (BTS) and mobile stations (MS) within the signal coverage area.
If weak signal transmissions occur within the coverage area because of indoor
applications, topological conditions or distance from the transmitter, extension of the
transmission range can be achieved by means of an optical distribution system.
Such a system contains an optical Master Unit and several Remote Units. The
number of the Remote Units depends on the hardware and software configuration.
The Remote Units are connected to the Master Unit with optical links. The optical
loss must be less than 10 dB inclusive optical couplers or splitters.
The Master Unit is the connection to the base transceiver stations. The configuration
of a Master Unit depends on the number of the Remote Units and the frequency
range.
The optical transmission uses WDM-systems with a wavelength of 1550 nm in the
uplink and 1310 nm in the downlink.
2.2. THE ION™-M7P/85P/17P/19P (INTELLIGENT OPTICAL NETWORK; MMR)
The ION-M7P/85P/17P/19P transports signals on the RF layer in a way that multiple
operators and multiple technologies are moved simultaneously from a cluster of base
stations to a remote location over the same fiber.
The ION optical distribution system provides a coverage solution for dense urban
areas, tunnels, subway, airports, convention centers, high-rise buildings and other
locations where physical structures increase path loss. It has been specifically
designed to reduce zoning problems and to provide homogeneous coverage. The
compact, mechanical design is specifically architected to mount inside of poles or
along side structures in such a way that it has a minimal visual impact.
The ION-M7P/85P/17P/19P is available in single or multi-band configuration
supporting 700 MHz, 850 MHz, 1700 MHz/ 2100 MHz and 1900 MHz in parallel. It
has been specifically tested and optimized for LTE, iDEN, GSM, EDGE, CDMA2000,
EV-DO, WCDMA, HSPA+, and OFDMA. Furthermore, it is provisioned for future
improvements to the modulation and frequency bands. In addition it is backwards
compatible to legacy standards such as TDMA and Analog.