GAI-Tronics ITA2000A ITA2000A Series Tone Remote Adapter with Scanning User and Installation Manual - Manual (Page 15)

ITA2000A Series Tone Remote Adapter Operation
11 03/13
Supervisor Mode
The ITA2000A is placed in the supervisor mode by pressing the SUPERVISOR button for less than four
seconds, or by pressing either the MONITOR or PTT buttons of an attached desk-mic accessory. This
feature can be disabled in Conventional mode. When supervisor mode is entered, the SUPERVISOR
LED
illuminates and the ITA2000A enters home-mode state. This is useful when a dispatcher needs to
disable control of the radio from all desk set operators and the accessory input. Pressing the
SUPERVISOR
button again for less than four seconds is the only method used to exit supervisor mode
and return the ITA2000A to normal operation.
In the home-mode state, the ITA2000A clears all channel steer lines to the radio and generates
continuous guard tone to the phone line. In addition, the ITA2000A ceases scanning if in Scan mode.
The generation of guard tone serves two purposes. First, all LOTL-equipped desk sets such as the
ITR2000A or IPE2500A connected to the ITA2000A will recognize the base station is now in use and
will effectively lock out any operations. Second, when using the Scan mode, the generation of the guard
tone will clear the scan (monitor) indicator of these connected desk sets indicating that scan has stopped.
When home-mode is exited, the ITA2000A returns to the previously selected channel, or if in Scan mode,
returns to the previous scan state. If scan were active prior to entering the home-mode state, the
ITA2000A returns to scan upon exiting home-mode state and generates a tone burst to the phone line to
update the connected desk sets appropriately. If scan were not active prior to entering home-mode state,
the ITA2000A will not resume scan upon exiting home-mode state.
Accessory Operation
The ITA2000A includes an accessory connector to allow access to the radio from other devices such as
an ILD1000A Local Control Desk Set, a PL1877A Telephone Interconnect, or an additional ITA2000.
With such devices, control of the radio is limited to monitor and PTT. When an accessory device
requires access to the radio, it will assert the appropriate input on the accessory connector. When this
assertion is detected, the ITA2000A enters home-mode state. This feature can be disabled when in
Conventional mode.
When an accessory asserts the accessory monitor input, the ITA2000A enters home-mode state. When
the accessory releases the accessory monitor input, the ITA2000A exits home-mode state. If in Scan
mode, the ITA2000A resumes scan after the scan stop time if scan were active prior to the assertion of
the accessory monitor input.
When the accessory asserts the accessory PTT input, the ITA2000A enters home-mode state for the
duration of the assertion when in Scan mode. When the accessory releases the accessory PTT input,
Conventional mode exits home-mode state, and Scan mode immediately returns to the previous scan
state.