User Manual

B-85
A PPENDIX
B
C HAPTER 0 SUPPORTED FREQUENCY RANGES
Appendix overview
This appendix provides reference information about the frequency ranges in which the
equipment can operate.
MMDS frequency range
MMDS stands for multichannel multipoint distribution service and is a system of transmitting
signals through microwave. MMDS represents frequencies in the 2.5 to 2.686 GHz band.
Although initially used to transmit video signals, MMDS has gone through regulatory changes
which allow licensees of the frequency range to engage in fixed, two-way digital
transmissions. The MMDS frequencies are ideally suited for broadband delivery of data,
voice, and Internet services.
Note that the MMDS band shares it range with the instructional television fixed service
(ITFS) band. ITFS makes up the A, B, C, D and G blocks. Each block contains 4 channels.
Blocks A through D occupy the contiguous space from 2500-2596 MHz and the G block
occupies space from 2644 to 2680 MHz, alternating every other channel with the H block.
Although the Federal Communication Commission (FCC) did not auction licenses for the
ITFS frequencies, operators often lease the ITFS frequencies. These leases are allowed as
long as the operator transmits up to 40 hours of educational programming per week.
Sometimes, MMDS is referred to as wireless cable.