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<ARTICLE>
Date="10/01/93"
Citation="58 FR 51299"
Group="commerce"
Type="PROPOSED RULE"
Department="FEDERAL COMMUNICATIONS COMMISSION"
Agency="FEDERAL COMMUNICATIONS COMMISSION"
Subject="Cordless Telephones"
<HEADER>
FEDERAL COMMUNICATIONS COMMISSION
47 CFR Parts 15 and 90
[ET Docket No. 93-235; FCC 93-422]
Cordless Telephones
AGENCY: Federal Communications Commission.
ACTION: Proposed rule.
</HEADER>
FEDERAL COMMUNICATIONS COMMISSION
47 CFR Parts 15 and 90
[ET Docket No. 93-235; FCC 93-422]
Cordless Telephones
AGENCY: Federal Communications Commission.
ACTION: Proposed rule.
..
------------------------------------------------------------
SUMMARY: This notice of proposed rulemaking (NPRM) proposes
to provide additional frequencies for operation of cordless
telephones, which could relieve channel congestion and reduce
interference to cordless telephones operating in the 46 MHz
and 49 MHz frequency bands. This proposal responds to a petition
for rule making filed by the Telecommunications Industry Association.
DATES: Comments must be submitted on or before November 8, 1993,
and reply comments on or before November 23, 1993.
ADDRESSES: Federal Communications Commission, 1919 M Street,
NW., Washington, DC 20554.
FOR FURTHER INFORMATION CONTACT: George Harenberg, Office of
Engineering and Technology, (202) 653-7314.
SUPPLEMENTARY INFORMATION: This is a summary of the Commission's
Notice of Proposed Rule Making in ET Docket No. 93-235, FCC
93-422, adopted August 20, 1993, and released September 17,
1993. The full text of this decision is available for inspection
and copying during normal business hours in the FCC Dockets
Branch (room 230), 1919 M Street, NW., Washington, DC. The complete
text of this decision also may be purchased from the Commission's
duplicating contractor, International Transcription Service,
Inc., at (202) 857-3800, 2100 M Street, NW., suite 140, Washington,
DC 20037.
Synopsis of Notice of Proposed Rulemaking
1. On August 20, 1992, the Personal Communications Section
of the Telecommunications Industry Association (TIA) filed a
petition seeking additional frequencies for cordless telephones.
TIA states that the continued popularity of cordless telephones
and the resulting increase in market penetration threatens to
cause channel-crowding problems, especially in high-density
locations such as urban areas and high-rise condominiums. Further,
TIA notes that five of the existing ten channels are available
for other 47 CFR part 15 low power transmitters. The 47 CFR
part 15 devices that give rise to the greatest concern are baby
monitors, which, because they tend to be active for long periods
of time, render these five channels unusable for nearby cordless
telephones.
2. TIA proposes that the Commission make available an additional
15 channel pairs using 30 frequencies near 44 MHz and 49 MHz
for cordless telephones. The proposed frequencies are currently
allocated to the Private Land Mobile Radio Service (PLMRS).
TIA asserts that use of the proposed frequencies will facilitate
design of cordless telephones that use both the existing and
the new frequencies. TIA believes that the 47 CFR part 15 rules
for these new frequencies should be identical to the current
rules governing 46/49 MHz channels, with the following exceptions:
(1) To reduce the likelihood of interference between cordless
telephones and the PLMRS, cordless telephones using the new
frequencies should include a mechanism for automatically monitoring,
and preventing transmitter activation on, frequencies on which
co-channel; PLMRS signals are present; (2) there is no need
to designate specific frequency pairs for each channel and (3)
``offset frequency'' operation should not be permitted.
3. In response to the TIA petition, the Commission put the
petition out for comment on October 1, 1992 and seven parties
submitted comments in response to the petition. All the comments
support the petition and urge the Commission to move forward
as soon as possible. In light of the above, we tentatively find
it in the public interest to make additional frequencies available
for cordless telephones in the 44 MHz and 49 MHz region of the
spectrum. Specifically, we are proposing to make the 30 frequencies
suggested by TIA available for cordless telephone use under
47 CFR part 15. This action will relieve channel crowding and
interference to cordless telephones. Because of the close proximity
to the current 46/49 MHz frequencies, manufacturers could employ
current designs and will only need to add the automatic channel
selection feature. We expect there would be little or no increase
in the cost of the equipment. We will apply the same technical
and administrative requirements that apply to the current 46/49
MHz cordless telephones. We invite comments on the proposed
frequencies and whether alternative frequencies would be more
suitable.
4. We recognize that the proposed 44 MHz frequencies are
located within the intermediate frequencies (IF) pass-band of
television receivers. In addition, in the frequency region of
TV IF where the proposed frequencies are to be located, television
receivers are somewhat more susceptible to interference than
the spectrum location of the current 46 MHz cordless telephone
operations. Comments are invited as to whether and to what extent
the proposed 44 MHz frequencies pose a significantly grater
interference risk to the reception of TV broadcasting than the
46 MHz frequencies already used by cordless telephone.
5. TIA proposed that cordless telephones be designed to include
a mechanism for automatically monitoring, and preventing activation
on, frequencies on which co-channel signals are present. Several
parties expressed concern regarding the cost of designing cordless
telephones that satisfy this requirement. In its reply comments,
TIA proposed the following wording for our Rules: Cordless telephones
using these frequencies must incorporate an automatic channel
selection mechanism which will prevent establishment of a link
on an occupied frequency.
6. We believe that cordless telephones using the proposed
frequencies must employ a mechanism to avoid causing interference
to the PLMRS. We agree with TIA that manufacturers should be
afforded flexibility in the type of interference-avoidance mechanisms
that are used. Accordingly, we are proposing the revised requirement
suggested by TIA. At the same time, we invite comment as to
whether there is a need for more specific requirements to protect
against interference to the PLMRS. We solicit information as
to the cost of implementing this requirement. We also invite
comment as to whether we should require any specific information
to be filed with applications for equipment authorization to
demonstrate compliance with this requirement.
7. The current 47 CFR part 15 rules assign specific pairs
of 46 MHz frequencies for base units and handsets for each of
the ten cordless telephone channels. TIA suggests that there
should be no pairing of the new frequencies. We agree that pairing
of frequencies is inappropriate in this case. We are, however,
proposing to designate the lower frequencies at 44 MHz for base
units in order to minimize potential interference to TV broadcasting.
This is consistent with the designation of the 46 MHz frequencies
for base units under the current rules.
8. The original rules for cordless telephones required each
channel to be centered in a 20 kHz bandwidth. The Commission
subsequently proposed and ultimately amended the rules to permit
manufacturers to place two (or more) signals inside the 20 kHz
bandwidth by narrowing signals to 10 kHz and offsetting them
from the center of the channel. We believe that the matter of
channel offsets should be considered concurrently for both the
existing and proposed cordless telephone channels so that our
rules will be consistent. Accordingly, we invite comment as
to other ways we can provide for future low-cost spectrum-efficient
cordless telephone that may seek to use the existing and proposed
frequencies. In particular, we invite comment as to whether
20 kHz is the appropriate bandwidth for the new frequencies.
9. The Initial Regulatory Flexibility Analysis is contained
in the test of the Notice.
10. Comment Dates. Pursuant to applicable procedures set
forth in 47 CFR 1.415 and 1.419, interested parties may file
comments on or before November 8, 1993, and reply comments on
or before November 23, 1993. To file formally in this proceeding,
you must file an original and five copies of all comments, reply
comments, and supporting comments. If you want each Commissioner
to receive a copy of your comments, you must file an original
plus nine copies. You should send comments and reply comments
to Office of the Secretary, Federal Communications Commission,
Washington, DC 20554. Comments and reply comments will be available
for public inspection during normal business hours in the Dockets
Reference Room of the Federal Communications Commission, 1919
M Street, NW., Washington, DC 20554.
11. Ex Parte Rules-Non-Restricted Proceeding. This is a non-
restricted notice and comment rule making proceeding. Ex parte
presentations are permitted, except during the Sunshine Agenda
period, provided they are disclosed as provided in Commission
rules. See generally 47 CFR 1.1202, 1.1203 and 1.1206(a).
12. For further information on this proceeding contact George
Harenberg, Technical Standards Branch, Office of Engineering
and Technology, 202-653-7314.
List of Subjects
47 CFR Part 15
Radio, Communications Equipment, Telephone.
47 CFR Part 90
Communications equipment, Radio.
Federal Communications Commission.
William F. Caton,
Acting Secretary.
Amendatory Text
A. Title 47 of the Code of Federal Regulations, parts 15
and 90, are proposed to be amended as follows:
PART 15-RADIO FREQUENCY DEVICES
1. The authority citation for part 15 continues to read as
follows:
Authority: Sections 4, 302, 303, 304, and 307 of the Communications
Act of 1934, as amended, 47 U.S.C. 154, 302, 303, 304, and 307.
2. Section 15.233 is amended by revising the section heading
and paragraph (b) to read as follows:
. 15.233 Operation within the bands 43.71-44.49 mHz, 46.60-
46.98 MHz, 48.75-49.51 MHz and 49.66-50.0 MHz.
* * * * *
(b) An intentional radiator used as part of a cordless telephone
system shall operate centered on one or more of the following
frequency pairs, subject to the following conditions:
(1) Frequencies shall be paired as shown below, except that
channel pairing for channels one through fifteen may be accomplished
by pairing any of the fifteen base transmitter frequencies with
any of the fifteen handset transmitter frequencies.
(2) Cordless telephones operating on channels one through
fifteen must incorporated an automatic channel selection mechanism
that will prevent establishment of a link on an occupied frequency
.
------------------------------------------------+-------------+---------------
| Base | Handset
Channel | transmitter | transmitter
| (MHz) | (MHz)
------------------------------------------------+-------------+---------------
| |
1 ............................................ | 43.720 | 48.760
2 ............................................ | 43.740 | 48.840
3 ............................................ | 43.820 | 48.860
4 ............................................ | 43.840 | 48.920
5 ............................................ | 43.920 | 49.012
6 ............................................ | 43.960 | 49.080
7 ............................................ | 44.120 | 49.100
8 ............................................ | 44.160 | 49.160
9 ............................................ | 44.180 | 49.200
10 ............................................ | 44.200 | 49.240
11 ............................................ | 44.320 | 49.280
12 ............................................ | 44.360 | 49.360
13 ............................................ | 44.400 | 49.400
14 ............................................ | 44.460 | 49.460
15 ............................................ | 44.480 | 49.500
16 ............................................ | 46.610 | 49.670
17 ............................................ | 46.630 | 49.845
18 ............................................ | 46.670 | 49.860
19 ............................................ | 46.710 | 49.770
20 ............................................ | 46.730 | 49.875
21 ............................................ | 46.770 | 49.830
22 ............................................ | 46.830 | 49.890
23 ............................................ | 46.870 | 49.930
24 ............................................ | 46.930 | 49.990
25 ............................................ | 46.970 | 49.970
------------------------------------------------+-------------+---------------
* * * * *
PART 90-PRIVATE LAND MOBILE RADIO SERVICES
1. The authority citation for part 90 continues to read as
follows:
Authority: Sections 4, 303, and 332, 48 Stat. 1066, 1082,
as amended; 47 U.S.C. Sections 154, 303, and 332, unless otherwise
noted.
2. In . 90.65, the table in paragraph (b) is amended by revising
the fifteen frequencies set forth below, and a new paragraph
(c)(44) is added, to read as follows:
. 90.65 Petroleum Radio Service.
* * * * *
(b) Frequencies available. *.*.*
Petroleum Radio Service Frequency Table
------------------------------------------------------------------------------
Frequency or band Class of station(s) Limitations
------------------------------------------------------------------------------
* * * * *
Megahertz:
* * * * *
48.76 ..................... ......do ................... 10, 44
* * * * *
48.84 ..................... ......do ................... 10, 44
48.86 ..................... ......do ................... 10, 44
* * * * *
48.92 ..................... ......do ................... 10, 44
* * * * *
49.02 ..................... ......do ................... 10, 44
* * * * *
49.08 ..................... ......do ................... 10, 44
49.10 ..................... ......do ................... 10, 44
* * * * *
49.16 ..................... ......do ................... 10, 44
* * * * *
49.20 ..................... ......do ................... 10, 44
* * * * *
49.24 ..................... ......do ................... 10, 44
* * * * *
49.28 ..................... ......do ................... 10, 44
* * * * *
49.36 ..................... ......do ................... 10, 44
* * * * *
49.40 ..................... ......do ................... 10, 44
* * * * *
49.46 ..................... ......do ................... 10, 44
* * * * *
49.50 ..................... ......do ................... 10, 44
* * * * *
------------------------------------------------------------------------------
(c) * * *
(44) This frequency is also used on a secondary basis for
cordless telephones under part 15 of this chapter.
* * * * *
3. In . 90.67, the table in paragraph (b) is amended by revising
the fifteen frequencies set forth below, and a new paragraph
(c)(38) is added, to read as follows:
. 90.67 Forest Products Radio Service.
* * * * *
(b) Frequencies available. * * *
Forest Products Radio Service Frequency Table
------------------------------------------------------------------------------
Frequency or band Class of station(s) Limitations
------------------------------------------------------------------------------
* * * * *
Megahertz:
* * * * *
48.76 ..................... ......do ................... 2, 38
* * * * *
48.84 ..................... ......do ................... 2, 38
48.86 ..................... ......do ................... 2, 38
* * * * *
48.92 ..................... ......do ................... 2, 38
* * * * *
49.02 ..................... ......do ................... 2, 38
* * * * *
49.08 ..................... ......do ................... 2, 38
49.10 ..................... ......do ................... 2, 38
* * * * *
49.16 ..................... ......do ................... 2, 38
* * * * *
49.20 ..................... ......do ................... 2, 38
* * * * *
49.24 ..................... ......do ................... 2, 38
* * * * *
49.28 ..................... ......do ................... 2, 38
* * * * *
49.36 ..................... ......do ................... 2, 38
* * * * *
49.40 ..................... ......do ................... 2, 38
* * * * *
49.46 ..................... ......do ................... 2, 38
* * * * *
49.50 ..................... ......do ................... 2, 38
* * * * *
------------------------------------------------------------------------------
(c) * * *
(38) This frequency is also used on a secondary basis for
cordless telephones under part 15 of this chapter.
* * * * *
4. In . 90.89, the table in paragraph (b) is amended by revising
the fifteen frequencies set forth below, and a new paragraph
(c)(23) is added, to read as follows:
. 90.89 Motor Carrier Radio Service.
* * * * *
(b) Frequencies available.* * *
Motor Carrier Radio Service Frequency Table
------------------------------------------------------------------------------
Frequency or band Class of station(s) Limitations
------------------------------------------------------------------------------
Megahertz:
* * * * *
43.72 ..................... ......do ................... 4, 23
43.74 ..................... ......do ................... 4, 23
* * * * *
43.82 ..................... ......do ................... 4, 23
43.84 ..................... ......do ................... 4, 23
* * * * *
43.92 ..................... ......do ................... 5, 6, 23
* * * * *
43.96 ..................... ......do ................... 5, 23
* * * * *
44.12 ..................... ......do ................... 5, 23
* * * * *
44.16 ..................... ......do ................... 5, 23
44.18 ..................... ......do ................... 5, 23
44.20 ..................... ......do ................... 5, 20, 23
* * * * *
44.32 ..................... ......do ................... 5, 23
* * * * *
44.36 ..................... ......do ................... 5, 6, 23
* * * * *
44.40 ..................... ......do ................... 5, 6, 23
* * * * *
44.46 ..................... ......do ................... 1, 23
44.48 ..................... ......do ................... 1, 23
* * * * *
------------------------------------------------------------------------------
(c) * * *
(23) This frequency is also used on a secondary basis for
cordless telephones under part 15 of this chapter.
* * * * *
[FR Doc. 93-24090 Filed 9-30-93; 8:45 am]
BILLING CODE 6712-01-M
------------------------------------------------------
The Contents entry for this article reads as follows:
Radio services, special:
Private land mobile services-
Cordless telephones; additional operation frequencies, 51299
</ARTICLE>
