User`s guide
3: Operation • 8
©2014 Axia Audio - Rev.1.3.8
OLED Display 
The OLED display will present the 10 character la-
bel or alternate label of the station or source assigned 
to the key. Rackmount and desktop models will present 
additional indicators on the display if the Talk button has 
been disabled, if the trigger value is higher than the sta-
tion, or if the call request has been issued but a response 
is pending. 
Talk Disabled
Call Pending
Other Controls 
CALLSTACK
The  CALLSTACK key is  a  exible  key used to  al-
low additional station-to-station communication even 
though that a station is not assigned. Select models have 
a CALLSTACK. When one station calls another station 
and the receiving station does not have the calling sta-
tion assigned to a channel, the call is processed through 
the  CALLSTACK.  If  the  trigger  levels  are  set  accord-
ingly, the call will be heard by the receiving station and 
the CALLSTACK will show an indication of the calling 
station on the OLED. The button(s) of the CALLSTACK 
can than be used to respond back. If the receiving sta-
tion has a higher trigger value, then the receiving station 
would need to press the button on the CALLSTACK to 
acknowledge the call. 
NOTE: On models without a CALLSTACK, a call 
will still be received by the 2nd station by default, 
but the station will have no indication of who 
called. The receiving station will have no means 
to engage with the caller. The caller would need 
to establish a Talk/Listen state in order for two-
way communication. Also be aware of trigger 
levels. If the receiving station has a higher trig-
ger value and no CALLSTACK, then the call will 
not be processed because the receiver has no 
acknowledge button.
On  select  models,  in  addition  to  the  CALLSTACK 
are a Select knob, Assign button, and Group button. The 
OLED of the CALLSTACK will display the last 4 pro-
cessed calls. With the use of the Select knob, one of the 
4 stations can be highlighted and the Talk button can be 
used to engage in communication. With a station high-
lighted, pressing the Assign button will cause the Assign 
LED  to  blink  and  allow  for  assigning  the  station  to  a 
key by pressing a button of the key. Note that any Talk 
or Listen settings associated with the key do not change 
through this process.
The Group button enables the talk state to multiple 
channels with a single button. Assigning channels to the 
group is done by pressing the Assign button so that the 
assign function is enabled (indicated by the assign LED 
blinking) and then pressing the Group button. The Group 
LED will blink to indicate the ability to dene the group. 
Pressing keys assign the keys to the group. The LED of 
the key will illuminate to indicate assignment. Pressing 
the button again will un-assign. Pressing the Group but-
ton again terminates the assignment to the group.
Other than showing the last processed calls, the 
CALLSTACK  OLED  will  also  present  some  menu 
items. The menu items are as follows:
Assign
Shift (if additional shift pages have been dened)
Status (for Rackmount/Desktop units)
The  Select knob allows for highlighting a menu. 
While a menu is highlighted, the Assign icon is shown 
to the right of the menu title. Pressing the Assign button 
enters into that menu. Note this behavior as highlighting 
of a menu item changes the function of the Assign button. 
Assign menu shows a listing of stations and dened 
external  sources  which  can  be  dened  to  keys.  Scroll 
through  the  list with  the  Select knob  and  pressing  the 
Assign  button  to  enter  into  assign  mode  (indicated  by 
the Assign LED blinking). Pressing any key assigns the 
selection to the channel and exits assign mode. At the 
bottom of the list is a Back option which exits the menu.
Shift menu  is  shown  if  multiple  Shift  pages  have 
been dened. Shift pages allow for different collection 
of key assignments. Entering into Shift menu shows the 
listing of Shifts, selecting the shift and pressing the As-
sign button will change the channel assignments. If the 










