Sec. 90.461  Direct and remote control of transmitters.

    (a) In general. Radio transmitters may be operated and controlled 
directly (as when the operating position for the transmitter and the 
transmitter being operated are at the same location), or remotely (as 
when the transmitter being operated and the position from which it is 
being operated are at different locations).
    (b) Control of transmitters at remote locations. Radio transmitters 
at remote locations may be operated and controlled through the use of 
wire line or radio links; or through dial-up circuits, as provided in 
paragraph (c) of this section. Such control links or circuits may be 
either those of the licensee or they may be provided by common carriers 
authorized by law to furnish such service.
    (c) Dial-up circuits. Dial-up circuits may be provided by wire line 
telephone companies under appropriate tariffs, and they may be used by 
licensees for purposes of transmitter control, provided:
    (1) The dial-up circuits serve only to link licensed transmitter 
control points and the transmitters being controlled.
    (2) The dial-up circuits are so designed that the transmitters being 
controlled cannot be operated from any fixed position other than the 
licensed control points for those transmitters.
    (3) Equipment used to provide the transmitter/dial-up-circuit 
interface is designed to preclude associated mobile units of the 
licensee from reaching any point(s) served by the wire line telephone 
facilities other than the control point(s) of the station(s) controlled.
    (4) Any direct electrical connection to the telephone network shall 
comply with applicable tariffs and with part 68 of the Commission's 
Rules (See Sec. 90.5(j)).
    (5) Interconnection, within the meaning of Secs. 90.7 and 90.477 
through 90.483, may not take place at a control point which connects to 
its associated transmitter(s) through dial-up circuits; nor may such 
dial-up transmitter control circuits be used in conjunction with (or 
shared by) interconnection equipment.
[ 43 FR 54791 , Nov. 22, 1978, as amended at  44 FR 67124 , Nov. 23, 1979; 
 60 FR 50123 , Sept. 28, 1995]