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IRAC Doc 31061 - Interoperability Plan


IRAC Document 31061/2FOR AGENDA - IRAC Doc. 31061/2
FOR INFORMATION - AH-214 Ref. Doc. 31061/1
REF: AH-214-051
April 21, 1999
MEMORANDUM TO: Executive Secretary, IRAC 
FROM: Convener, Ad Hoc 214
SUBJECT: Proposed Changes to the NTIA Manual for a VHF/UHF Public Safety 
Interoperability Plan.

Ad Hoc 214, in cooperation with the Federal Law Enforcement Wireless User's 
Group (FLEWUG) has developed a recommended plan for interoperable law 
enforcement and incident response operations in the 162-174 MHz and 406.1-420 
MHz bands. These frequencies are to be available for assignment to all Federal 
Government agencies to satisfy intermittent law enforcement and public safety 
incident response requirements. Non-Government entities may use these 
frequencies only in cooperation with agencies of the Federal Government.

Ad Hoc 214 has approved the attached proposed changes to the NTIA Manual and 
forwards them to the IRAC for approval.

Attachment 

4.3.X Plans for Interagency Law Enforcement and Incident Response Operations in 
the Bands 162-174 MHz and 406.1-420 MHz

CONDITIONS FOR USE

1. The frequencies shown in this plan are available for assignment to all 
Government agencies to satisfy intermittent law enforcement and public safety 
incident response requirements. Non-Government agencies may use these 
frequencies only in cooperation with agencies of the Federal Government. Federal 
agencies will provide written certification to non-Government agencies 
indicating that the non-Government operation is necessary. Non-Government 
entities will be advised in the written certification that under Federal law 
they are required to obtain a license from the Federal Communications Commission 
(FCC) for such operations, and that the FCC File Number for the license, once 
obtained, will be provided to the Government agency providing the written 
certification. A copy of this certification will also be submitted to the NTIA 
Public Safety Program Office. Federal agencies shall comply with the 
requirements of Section 2.3.12 of this Manual. The frequencies are available on 
a shared basis and will not be authorized for the exclusive use of any one 
agency.

2. All Government operations shall be authorized in accordance with Chapter 9 of 
this Manual. The FCC will submit all non-Government applications to the 
Frequency Assignment Subcommittee (FAS) for approval. 

3. Base stations are authorized use of the mobile transmit frequencies for 
access to fixed stations, e.g., repeaters. Mobile stations are permitted to use 
fixed station transmit frequencies for talk-around communications.

4. The following restrictions apply:
(a) the minimum ERP necessary to support the intended use shall be employed;
(b) the maximum base or mobile transmitter output power shall not exceed 125 
Watts; and
(c) the gain of the base station antenna shall not exceed 6 dBi.

5. Exceptions to the above restrictions will be considered by the FAS on a 
case-by-case basis.

LAW ENFORCEMENT PLANS

1. Frequencies 167.0875 MHz and 414.0375 MHz are designated as National Calling 
Channels for initial contact and will be identified in the radio as indicated in 
paragraph 2 below. Initial contact communications will be established using 
analog FM emission (11KF3E). The agency in control of the incident will assign 
specific operational channels as required for incident support operations.

2. The interoperability frequencies will be identified in mobile and portable 
radios as follows with Continuous Tone-Controlled Squelch Systems (CTCSS) 
frequency 167.9 Hz and/or Network Access Code (NAC) $68F:

VHF PLAN
Mobile Mobile

Identifier Transmit (MHz) Receive (MHz) 
Natl Call  167.0875       167.0875 Simplex 
Inop 1     162.0875       167.0875 
Inop 2     162.2625       167.2500 
Inop 3     162.8375       167.7500 
Inop 4     163.2875       168.1125 
Inop 5     163.4250       168.4625 
Inop 6     167.2500       167.2500 Simplex 
Inop 7     167.7500       167.7500 Simplex
Inop 8     168.1125       168.1125 Simplex
Inop 9     168.4625       168.4625 Simplex

UHF PLAN
Mobile Mobile 

Identifier Transmit (MHz) Receive (MHz)
Natl Call  414.0375       414.0375 Simplex
Inop 1     418.9875       409.9875 
Inop 2     419.1875       410.1875 
Inop 3     419.6125       410.6125 
Inop 4     414.0625       414.0625 Simplex
Inop 5     414.3125       414.3125 Simplex
Inop 6     414.3375       414.3375 Simplex
Inop 7     409.9875       409.9875 Simplex
Inop 8     410.1875       410.1875 Simplex
Inop 9     410.6125       410.6125 Simplex

3. All applications using these allotted frequencies shall be affixed with 
Record Note Sxxx - This assignment is for a joint law enforcement requirement 
pursuant to Section 4.3.X of this Manual.

INCIDENT RESPONSE PLANS

1. Frequencies 169.5375 MHz, paired with 164.7125 MHz, and 410.2375 MHz, paired 
with 419.2375 MHz, are designated as the calling channels for initial contact 
and will be identified in the radio as indicated in paragraph 2. Initial contact 
will be established using analog FM emission (11KF3E). CTCSS will not be used on 
the calling channels to ensure access by stations from outside the normal area 
of operation. The agency in control of the incident will assign specific 
operational channels as required for incident support operations.

2. The Interoperability frequencies will be identified in mobile and portable 
radios as follows:

VHF PLAN
Mobile Mobile

Identifier  Transmit (MHz) Receive (MHz)     CTCSS
VHF Calling 164.7125       169.5375          None
VHF 1       165.2500       170.0125          As required
VHF 2       165.9625       170.4125          As required
VHF 3       166.5750       170.6875          As required
VHF 4       167.3250       173.0375          As required
VHF 5       169.5375       169.5375 Simplex  As required
VHF 6       170.0125       170.0125 Simplex  As required
VHF 7       170.4125       170.4125 Simplex  As required
VHF 8       170.6875       170.6875 Simplex  As required
VHF 9       173.0375       173.0375 Simplex  As required 

UHF PLAN
Mobile Mobile

Identifier  Transmit (MHz) Receive (MHz)     CTCSS
UHF Calling 419.2375       410.2375          None
UHF 1       419.4375       410.4375          As required
UHF 2       419.6375       410.6375          As required
UHF 3       419.8375       410.8375          As required
UHF 4       413.1875       413.1875 Simplex  As required
UHF 5       413.2125       413.2125 Simplex  As required
UHF 6       410.2375       410.2375 Simplex  As required
UHF 7       410.4375       410.4375 Simplex  As required
UHF 8       410.6375       410.6375 Simplex  As required
UHF 9       410.8375       410.8375 Simplex  As required

3. All applications using these allotted frequencies shall be affixed with 
Record Note Sxxx - This assignment is for a joint incident response requirement 
pursuant to Section 4.3.X of this Manual.