GAI-Tronics IPE2500A, IPE2500A-MLS Paging Encoder / Desktop Controller User and Installatoin Manual - Manual (Page 19)

IPE2500A and IPE2500A-MLS Paging Encoder/Desktop Controller Operation
13 03/12
Handset Transmit
Use of the handset is recommended when the desk set is located in noisy surroundings or if full-duplex
two-wire operation is desired. This may be used for types of systems that provide talk courtesy tones,
such as trunking. Press the handset PTT bar or
TRANSMIT
button and speak into the handset
microphone to transmit when the handset is off-hook.
Transmit From Internal (Local) Microphone
Use the internal microphone only in low noise environments. The handset must be on-hook for the local
microphone to operate. Press the
TRANSMIT
button and speak in the direction of the integral
microphone. For the best transmit audio quality, maintain a distance of about 18 inches from the
microphone.
Transmit From Desk Microphone or Footswitch
All models can be keyed to transmit with an external desk microphone through the audio accessory port.
When a PTT signal is asserted through this port, TX audio will also originate through this port. Use of
the GAI-Tronics XDM002A or XDM004A Desk Mic, or compatible microphone, is recommended.
N OTES :
1. The polarity of the desk mic PTT and monitor inputs is CARD Suite programmable. If the polarity
of either of these inputs is set for normally closed, it is necessary to keep the desk microphone
connected at all times. Removing the microphone during operation may cause the keyboard to stop
responding. This is caused by the internal pull-ups on these two pins. If the desk mic maintains a
normally closed connection to ground, the connection is opened when the button is pressed and the
desk set recognizes the key as pressed. Without the desk mic connected, the connection remains
open and the desk set continually sees the key pressed.
2. The IPE2500A has three microphone sensitivity adjustments. Refer to the “Installation” section of
this manual.