Sec.  95.193   (FRS Rule 3) Types of communications.

   (a) You may use an FRS unit to conduct two-way voice communications with
   another  person.  You may use an FRS unit to transmit one-way voice or
   non-voice communications only to establish communications with another
   person, send an emergency message, provide traveler assistance, provide
   location information, transmit a brief text message, make a voice page, or
   to conduct a brief test.

   (b) Non-voice communications. (1) The FRS unit may transmit tones to make
   contact or to continue communications with a particular FRS unit. If the
   tone is audible (more than 300 Hertz), it must be transmitted continuously
   no longer than 15 seconds at one time. If the tone is subaudible (300 Hertz
   or less), it may be transmitted continuously only while you are talking.

   (2) The FRS unit may transmit digital data containing location information,
   or requesting location information from one or more other FRS units, or
   containing a brief text message to another specific FRS unit. Digital data
   transmissions must be initiated by a manual action or command of a user,
   except that an FRS unit receiving an interrogation request may automatically
   respond with its location. Digital data transmissions shall not exceed one
   second, and shall be limited to no more than one digital transmission within
   a thirty-second period, except that an FRS unit may automatically respond to
   more than one interrogation request received within a thirty-second period.

   (c) You must not use an FRS unit in connection with any activity which is
   against federal, state or local law.

   (d) You must, at all times and on all channels, give priority to emergency
   communication  messages concerning the immediate safety of life or the
   immediate protection of property.

   (e) No FRS unit may be interconnected to the public switched network.

   [ 61 FR 28768 , June 6, 1996, as amended at  68 FR 9901 , Mar. 3, 2003]