User Manual

20
SELECTIVE SIGNALING
Selective signaling controls the muting and unmuting of the receive audio.
This allows a user or dispatcher to selectively call an individual radio or group
of radios. The P
ANTHER
300M mobile radio supports selective signaling in
Type 99 decode format.
In a selective signaling environment, the P
ANTHER
300M mobile radio
operates in one of two states, Monitor mode or Selective Call mode.
In the Monitor mode, the decoder is disabled and all calls are heard by the
user.
In the Selective Call mode, the decoder is enabled and only calls intended for
the user will be heard.
Selective signaling operates with or without Channel Guard. If Channel
Guard is enabled, the radio can be programmed with an "And" or an "Or"
option.
If the "And" option is programmed, only calls with the correct selective
signaling AND correct Channel Guard tones are heard by the user.
If the "Or" option is programmed, calls with the correct Channel Guard OR
calls with the correct selective signaling and Channel Guard tones are heard
by the user.
A radio operating in Selective Call mode that receives a selective call
switches to the Monitor mode and the TX/RX LED flashes green. The TX/RX
LED indicates whether the channel has a carrier signal. The following
graphic depicts the flashing pattern of the TX/RX LED.
Monitor mode Without Carrier On
Off
Monitor mode With Carrier On
Off
Type 99 Operation
Type 99 is Com-Net Ericsson’s proprietary method for in-band, two-tone
sequential signaling. Type 99 is a conventional signaling protocol that
controls the muting and unmuting of a radio. Type 99 encoded base
stations, mobiles, or portable radios can selectively call individual units or
groups of units in a conventional system. Type 99 is used in paging
operations; a dispatcher has the ability to selectively call a radio or a group of
radios.