MAN_DZ7_001 Rev 1.1 Flightcell® DZMx Plus Installation Manual
Page 25 of 61
Effective Date: 28 Jun 2021
Iridium Push-To-Talk (PTT)
Iridium PTT is a licensed feature. If you wish to use Iridium PTT, you must subscribe to the
PTT service through your Iridium Service Provider and purchase a licence from Flightcell by
contacting
»
To enable and configure your DZMx Plus for PTT using DZMx Connect. Go to
Settings > Modem > Internal Sat modems.
»
If you wish to have the DZMx Plus start up in PTT mode, activate Start PTT on Boot.
Select DONE when finished.
»
If the PTT talkgroups are changed by your Iridium Service Provider, it is
recommended to update talk groups using the DZMx Plus Control Head. Select
MENU > PTT Talk Groups > Refresh Talk Groups.
Configuring the PTT Input
PTT calls can be triggered from the DZMx Plus keypad, but it is preferable to use a
PTT switch connected to a DZMx Plus Input.
Modem Configuration
The DZMx Plus can be configured with up to three internal modems and one external modem
or satellite phone.
Cellular Modems
The following cellular modems may be installed in the DZMx Plus:
»
A 4G (LTE) modem
»
A 450 MHz modem.
Different countries or geographic areas use different cellular bands, due to international and
national radio frequency licensing agreements.
In Revision 3 DZMx, the cell modem supports most of the bands to for all countries in the
world.
In Revision 4 DZMx, four different modem versions are used for different geographic regions.
The four modem options are:
»
Europe
»
Asia/Pacific and South America (APAC)
»
Americas and Band 14 (North America, including the US Public Safety Band, band
14)
»
Japan.
Note:
The Call Priority setting can be useful for automatically muting a PTT call
when making a call on another modem.
