tom wrote:
what's the difference between simplex and half-duplex?

Description of GMRS Simplex and Duplex Operation:
http://www.gmrs.org/gmrs_ovr.htm


As a member of a GMRS Repeater User's Group (RUG),
you can access the group's repeater for your personal use.

FCC's General Mobile Radio Service (GMRS) website
http://wireless.fcc.gov/services/personal/generalmobile

PRSG's GMRS Licensing Information
http://www.provide.net/~prsg/license.htm

The FCC GMRS Licensing Process
http://www.pe.net/~atd/fcc605.htm

Filing General Mobile Radio Service License
http://www.hrdent.com/gmrs/gmrsapp.html

FCC 605 Main Form - Quick-Form Application for Authorization
http://www.fcc.gov/Forms/Form605/605main.pdf (.PDF file)

FCC 159 Form - Remittance Advice
http://www.fcc.gov/Forms/Form159/159.pdf (.PDF file)

A Travel Tone System for GMRS travelers and vistors
http://www.gmrsweb.com/gmrs1413.html

A More Detailed Description
http://www.provide.net/~prsg/wi-gmrs.htm

GMRS Web Magazine
http://www.gmrsweb.com/gmrs.html

General Mobile Radio Service Forums
http://www.popularwireless.com./cgi-bin/Ultimate.cgi

Yahoo! Groups: GMRS Group (may require cookies/sign-in)
http://groups.yahoo.com/group/GMRS

GMRS Web Magazine Mailing List (may require cookies/sign-in)
http://groups.yahoo.com/group/gmrsweb/messages

Radio Emergency Associated Communications Teams (REACT)
http://www.reactintl.org

A Central Registry for G-M-R-S Repeater Owners and Users
http://www.g-m-r-s.org

The GMRS Web Bubble-Pack Pirate FAQ
http://www.gmrsweb.com/gmrsbppfaq.html

Radio Retailer Code of Conduct
http://www.gmrsweb.com/gmrscoderetailer.html

GMRS Intruder Alert!
http://www.gmrsweb.com/intruderalert.html

GMRS Radio Operator Code of Conduct
http://www.gmrsweb.com/gmrscodeoperator.html