How the microphone and optional handset work together
Use the Intercom or Conference mode
Base Unit and Optional
Handset
The Intercom mode works ONLY when one or two optional handset(s) are installed.
1 Hold down 
or IC or 
to enter INTERCOM or CONFERENCE mode. Conference mode is only available when 2 handsets are connected, and is used to connect all 3 units together. This disables the radio receiver except for incoming DSC calls.
2The intercom calls the other unit as detailed in the following table.
3Press PTT when invited.
4 Press ESC to exit the INTERCOM mode, insert separate row for Handset Intercom mode.
5 For operation of the IC key see below.
WX
IC
IC
H/L
IC
Using the IC key
The function of these modes will vary depending on the number of VHF705 handsets connected:
·If no Handsets are connected, pressing the IC key will generate an error beep.
·If one handset is connected, pressing the IC key will enter Intercom mode.
·If two handsets are connected pressing the IC key the operation will be as follows:
IC Key | 1st press | 2nd press | 3rd press | 4th press |
|
|
|
|
|
Main unit (MU) | Intercom | Intercom | Conference | Repeat cycle |
| with HS1 | with HS2 |
|
|
|
|
|
|
|
1st handset (HS1) | Intercom | Intercom | Conference | Repeat cycle |
| with MU | with HS2 |
|
|
|
|
|
|
|
2nd handset (HS2) | Intercom | Intercom | Conference | Repeat cycle |
| with MU | with HS1 |
|
|
|
|
|
|
|
Note: in this mode you must press ENT key to select the mode
Northstar Explorer 725/705 Quickstart Guide | 9 |
