Motorola dtr series dtr550 User Manual

9980384R89-O

February 10, 2005

General Radio Operations: Receiving and Making Calls

2-3

NOTE: Your DTR Series radio must be programmed to be fully compatible with other DTR Series 

radios and fully utilize all radio features. Refer to Chapter 3 - Advanced Radio Operations.

Your radio can make and receive three different types of voice calls:

• PublicGroup – One-to-many communication to all radios set to your channel and PublicGroup 

number. All DTR Series radios are factory programmed with 2 to 5 PublicGroups.

• Private – One-to-one communication with another radio, requires adding a user to the Contacts 

List.

• PrivateGroup – One-to-many communication to only radios in your group. Requires adding all 

members to your Contact List then cloning the group (either over the air or with the RRDN5378 
cloning cable) to member radios. Offers a higher level of privacy than a PublicGroup. 

When a call is received, the radio chirps and the display shows the call type and transmitting caller’s 
user ID or name.

1. Choose a contact from your Scroll List, Contacts, or Recent Call List.
2. Press and hold the PTT button. Begin speaking after the radio emits the talk permit tone. To 

maximize clarity, hold the radio two-to-three inches away from your mouth.

3. Release the PTT button to listen. 

NOTE: If “User Not Available” displays, the recipient is either: In a Call, Out of Range, or Turned Off. 

Press 

 to cancel and then try the call again. When contacting a group, at least one 

member must be available for the call to be successful.

Talkgrp in Use

Security

(Joe Smith)

Private in use

Mike Jones