Call Signs

[BaLa]

I'm posting this in the MO forum (obviously)
Feel free to move it.


This is a somewhat location specific question. :roll:


I scan in the following areas, St. Robert, Waynesville, Lebanon.
I also have the MO HP frequencies programmed in my scanner.

I have noticed that during normal operations, the Police departments do not broadcast their call sign.

With the exception of the MO HP, and if one of the PDs contacts the Higway Patrol, then they do announce their call signs.
The HP announces their call sign after almost every transmission.

Why is that?

I think there are some people here that work in the field?
Maybe they can shed some light on this question for me.

I thought that it might have had something to do with their power output.

 

[kb0nhx]

Callsigns

All agencies are required to transmit their callsign, by morse code or spoken voice, at the end of a series of transmissions (however you want to interpret that). At the MSHP, we do so not only because it's FCC regulation, but also the cars in the field cannot hear the other car that is talking to dispatch and it lets them know the frequency is not in use anymore once they hear the callsign. They are free to call in at that time.

It doesn't have anything to do with the power output as far as I know, all stations must identify, most don't unless their on 155.370, though.

 

[BaLa]

Re: Callsigns

All agencies are required to transmit their callsign, by morse code or spoken voice, at the end of a series of transmissions (however you want to interpret that). At the MSHP, we do so not only because it's FCC regulation, but also the cars in the field cannot hear the other car that is talking to dispatch and it lets them know the frequency is not in use anymore once they hear the callsign. They are free to call in at that time.

It doesn't have anything to do with the power output as far as I know, all stations must identify, most don't unless their on 155.370, though.

thanks for the answer..

I thought I knew there was somebody that worked in the field here.

 

[kc0rnp]

Correct me if I am wrong, but I think the FCC rules used to say that you had to give your call sign after each transmition.

I also remember someting about every hour you were to give your call sign and then also something about every 30 mins.

I know for Hams we are to give our call signs every 10 mins when haveing a converstation with another ham or running a net.

Can someone post the current FCC rules for public safety, and businsss band IDing of call signs???

 

[kb0nhx]

Callsigns

--------------------------------------------------------------------------------

Here's your wish . . . Part 90 reg's on identification see link below for whole text.

http://a257.g.akamaitech.net/7/257/...cess.gpo.gov/cfr_2004/octqtr/47cfr90.425.htm

[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR90.425]

[Page 413-415]

TITLE 47--TELECOMMUNICATION

CHAPTER I--FEDERAL COMMUNICATIONS
COMMISSION (CONTINUED)

PART 90_PRIVATE LAND MOBILE RADIO SERVICES--Table of Contents

Subpart N_Operating Requirements

Sec. 90.425 Station identification.

Stations licensed under this part shall transmit identification in
accordance with the following provisions:
(a) Identification procedure. Except as provided for in paragraphs
(d) and (e) of this section, each station or system shall be identified
by the transmission of the assigned call sign during each transmission
or exchange of transmissions, or once each 15 minutes (30 minutes in the
Public Safety Pool) during periods of continuous operation. The call
sign shall be transmitted by voice in the English language or by
International Morse Code in accordance with paragraph (b) of this
section. If the station is employing either analog or digital voice
scrambling, or non-voice emission, transmission of the required
identification shall be in the unscrambled mode using A3E, F3E or G3E
emission, or International Morse, with all encoding disabled.
Permissible alternative identification procedures are as follows:
(1) A mobile relay stations call sign may be used to identify the
associated control and mobile stations, except in the Public Safety Pool
where the stations operate on frequencies below 450 MHz. Alternatively,
a base station (including a mobile relay station) which is controlled by
radio may be identified by the transmission of the call sign of the
station at which communications originate.
(2) One or more fixed relay stations may be identified by the
transmission of the call signs of the stations at which the
communications originate.
(3) When a mobile station transmits on a different frequency than
its associated base station, the assigned call sign of either the mobile
station or the base station may be transmitted. Further, a single mobile
unit in the licensee's authorized geographic area of operation may
transmit station identification on behalf of any other operating mobile
units in the fleet.
(4) Use of an identifier other than the assigned call sign. (i) In
the Public Safety Pool, mobile units licensed to a governmental entity
and which operate on frequencies above 30 MHz may use an identifier
which contains, at a minimum, the name of the licensee if the licensee
maintains at the station a list of the special identifiers to be used by
the mobile units.

 

[kc0rnp]

Thanks....Now if I can only get the PS and Fire units where I live to realize this