Sec.  90.477   Interconnected systems.

   (a) Applicants for new land stations to be interconnected with the public
   switched telephone network must indicate on their applications (class of
   station code) that their stations will be interconnected. Licensees of land
   stations that are not interconnected may interconnect their stations with
   the public switched telephone network only after modifying their license.
   See  Sec. 1.929 of this chapter. In all cases a detailed description of how
   interconnection is accomplished must be maintained by licensees as part of
   their station records. See  Sec. 90.433 of this part.

   (b) In the frequency ranges 806–824 MHz, 851–869 MHz, 896–901 MHz, and
   935–940 MHz, interconnection with the public switched telephone network is
   authorized under the following conditions:

   (1) Interconnected operation is on a secondary basis to dispatch operation.
   This restriction will not apply to trunked systems or on any channel
   assigned exclusively to one licensee.

   (2) Interconnection may be accomplished at any location through a separate
   or shared interconnection device. When land stations subject to this part
   are multiple licensed or shared by authorized users, arrangements for
   telephone service must be made with a duly authorized carrier by users,
   licensees, or their authorized agents on a non-profit cost sharing basis.
   When telephone service costs are shared, at least one licensee participating
   in the cost sharing arrangement must maintain cost sharing records and the
   costs must be distributed at least once a year. Licensees, users, or their
   authorized agents may also make joint use arrangements with a duly
   authorized carrier and arrange that each licensee or user pay the carrier
   directly for the licensee's or user's share of the joint use of the shared
   telephone service. A report of the cost distribution must be placed in the
   licensee's station records and made available to participants in the sharing
   and the Commission upon request. In all cases, arrangements with the duly
   authorized carrier must disclose the number of licensees and users and the
   nature of the use.

   (c) Interconnection of facilities in the Radiolocation Service (subpart F)
   will not be permitted.

   (d) In the frequency ranges below 800 MHz, interconnection with the public
   switched telephone network is authorized under the following conditions:

   (1) Interconnected operation is on a secondary basis to dispatch operation.
   This restriction will not apply to trunked systems or on any channel
   assigned exclusively to one licensee.

   (2) Interconnection may be accomplished at any location through a separate
   or shared interconnection device. When land stations subject to this part
   are multiple licensed or shared by authorized users, arrangements for
   telephone service must be made with a duly authorized carrier by users,
   licensees, or their authorized agents on a non-profit cost sharing basis.
   When telephone service costs are shared, at least one licensee participating
   in the cost sharing arrangement must maintain cost sharing records and the
   costs must be distributed at least once a year. Licensees, users, or their
   authorized agents may also make joint use arrangements with a duly
   authorized carrier and arrange that each licensee or user pay the carrier
   directly for the licensee's or user's share of the joint use of the shared
   telephone service. A report of the cost distribution must be placed in the
   licensee's station records and made available to participants in the sharing
   and the Commission upon request. In all cases, arrangements with the duly
   authorized carrier must disclose the number of licensees and users and the
   nature of the use.

   (3) For licensees in the Industrial/Business Pool and those licensees who
   establish eligibility pursuant to  Sec. 90.20(a)(2) of this part, except for
    Sec.  Sec. 90.20(a)(2)(i) and 90.20(a)(2)(ii) of this part and medical emergency
   systems in the 450–470 MHz band, interconnection will be permitted only
   where the base station site or sites proposed stations are located 120 km
   (75 mi.) or more from the designated centers of the urbanized areas listed
   below. If these licensees seek to connect within 120 km (75 mi.) of the 25
   cities, they must obtain the consent of all co-channel licensees located
   both within 120 km (75 mi.) of the center of the city; and within 120 km (75
   mi.) of the interconnected base station transmitter. The consensual
   agreements among the co-channel licensees must specifically state the terms
   agreed upon and a statement must be submitted to the Commission indicating
   that all co-channel licensees have consented to the use of interconnection.
   If a licensee has agreed to the use of interconnection on the channel, but
   later decides against the use of interconnection, the licensee may request
   that the co-channel licensees reconsider the use of interconnection. If the
   licensee is unable to reach an agreement with co-channel licensees, the
   licensee may request that the Commission consider the matter and assign it
   to another channel. If a new licensee is assigned to a frequency where all
   the co-channel licensees have agreed to the use of interconnection and the
   new licensee does not agree, the new licensee may request that the
   co-channel licensees reconsider the use of interconnection. If the new
   licensee cannot reach an agreement with co-channel licensees it may request
   that the Commission reassign it to another channel.

   Note: Coordinates are referenced to North American Datum 1983 (NAD83).


------------------------------------------------------------------------
           Urban area               North  latitude     West  longitude
------------------------------------------------------------------------
New York, New York-Northeastern   40 °45[min]06.4  73 °59[min]37.5
 New Jersey.                       [sec].              [sec]
Los Angeles-Long Beach,           34 °03[min]15.0  118 °14[min]31.
 California.                       [sec].              3[sec]
Chicago, Illinois-Northwestern    41 °52[min]28.1  87 °38[min]22.2
 Indiana.                          [sec].              [sec]
Philadelphia, Pennsylvania/New    39 °56[min]58.4  75 °09[min]19.6
 Jersey.                           [sec].              [sec]
Detroit, Michigan...............  42 °19[min]48.1  83 °02[min]56.7
                                   [sec].              [sec]
San Francisco-Oakland,            37 °46[min]38.7  122 °24[min]43.
 California.                       [sec].              9[sec]
Boston, Massachusetts...........  42 °21[min]24.4  71 °03[min]23.2
                                   [sec].              [sec]
Washington, DC/Maryland/Virginia  38 °53[min]51.4  77 °00[min]31.9
                                   [sec].              [sec]
Cleveland, Ohio.................  41 °29[min]51.2  81 °41[min]49.5
                                   [sec].              [sec]
St Louis, Missouri/Illinois.....  38 °37[min]45.2  90 °12[min]22.4
                                   [sec].              [sec]
Pittsburgh, Pennsylvania........  40 °26[min]19.2  79 °59[min]59.2
                                   [sec].              [sec]
Minneapolis-St. Paul, Minnesota.  44 °58[min]56.9  93 °15[min]43.8
                                   [sec].              [sec]
Houston, Texas..................  29 °45[min]26.8  95 °21[min]37.8
                                   [sec].              [sec]
Baltimore, Maryland.............  39 °17[min]26.4  76 °36[min]43.9
                                   [sec].              [sec]
Dallas-Fort Worth, Texas........  32 °47[min]09.5  96 °47[min]38.0
                                   [sec].              [sec]
Milwaukee, Wisconsin............  43 °02[min]19.0  87 °54[min]15.3
                                   [sec].              [sec]
Seattle-Everett, Washington.....  47 °36[min]31.4  122 °20[min]16.
                                   [sec].              5[sec]
Miami, Florida..................  25 °46[min]38.4  80 °11[min]31.2
                                   [sec].              [sec]
San Diego, California...........  32 °42[min]53.2  117 °09[min]24.
                                   [sec].              1[sec]
Atlanta, Georgia................  33 °45[min]10.4  84 °23[min]36.7
                                   [sec].              [sec]
Cincinnati, Ohio/Kentucky.......  39 °06[min]07.2  84 °30[min]34.8
                                   [sec].              [sec]
Kansas City, Missouri/Kansas....  39 °04[min]56.0  94 °35[min]20.8
                                   [sec].              [sec]
Buffalo, New York...............  42 °52[min]52.2  78 °52[min]20.1
                                   [sec].              [sec]
Denver, Colorado................  39 °44[min]58.0  104 °59[min]23.
                                   [sec].              9[sec]
San Jose, California............  37 °20[min]15.8  121 °53[min]27.
                                   [sec].              8[sec]
------------------------------------------------------------------------

   (e) Additional frequencies shall not be assigned to enable any licensee to
   employ a preferred interconnection capability.

   (f) Paging systems operating on frequencies in the bands below 800 MHz are
   not subject to the interconnection provisions of  Sec. 90.477(d)(3).

   [ 47 FR 17520 , Apr. 23, 1982, as amended at  48 FR 29518 , June 27, 1983;  50 FR 15152 , Apr. 17, 1985;  51 FR 14998 , Apr. 22, 1986;  51 FR 37401 , Oct. 22,
   1986;  52 FR 15501 , Apr. 29, 1987;  52 FR 29856 , Aug. 12, 1987;  53 FR 1025 ,
   Jan. 15, 1988;  58 FR 44961 , Aug. 25, 1993;  61 FR 6576 , Feb. 21, 1996;  62 FR 18934 , Apr. 17, 1997;  63 FR 68966 , Dec. 14, 1998]