Cisco Cisco IPICS Release 2.1 Referências técnicas

The following tips provide guidance to help 
enhance voice quality on the PMC:

For optimum voice quality, use a 
high-speed connection with the PMC.

Use the “Optimize for low bandwidth” 
option when your channel connects via 
a low bandwidth/high latency link.

Limit the use of applications that 
consume high-CPU and high-network 
bandwidth on the PMC client machine 
at the same time that you use the PMC.

Ensure that the QoS Packet Scheduler is 
installed on the PMC client machine.

To minimize echo, check to ensure that 
you use the preferred or default sound 
devices in the Windows audio settings.

The use of a PC analog sound card 
and/or analog port on your laptop 
typically results in lower quality audio.

Use a high-quality headset and 
microphone for enhanced voice quality.

For proper operation, connect a USB 
DSP headset to the client machine 
before you launch the PMC; otherwise, 
you will need to restart the PMC.

If others hear an audible hum when you 
talk, the headset may be defective. To 
resolve this issue, replace the headset.

Check the Windows and headset device 
settings to ensure that the microphone 
is not muted or set too low.

Check your microphone placement so 
that it is positioned about 2 to 6 inches 
from your mouth.

If the microphone is busy or cannot be 
opened, you may hear but you will not 
be able to talk. Close other open audio 
application(s) and restart the PMC.

Check the audio recording and 
playback capability of the microphone 
by using the Windows Sound Recorder.

Check the PMC volume level. If it is set 
too low, click the volume up button.

Check that the output speaker volume 
settings are not muted or too low.

The following radio skin caveats may affect 
functionality and/or voice quality:

When the PMC connects via SIP, radio 
function is limited; RFC tones may get 
translated into audible inband tones 
and cause the physical radio to retune.

The voice replay feature plays back 
audio on the radio channel that was 
tuned (active) at the time of capture.

Mixing remote and multicast PMC 
users on the same radio may cause voice 
quality and operational issues.

PMC channels may appear in the following 
states:

When the channel appears dimmed, 

the PMC is not transmitting traffic.

Activating—The Activate button 
appears highlighted.

Activated—The PTT channel button 
and volume indicator are highlighted.

Not Activated—No PMC buttons 
appear highlighted; channels appear in 
blueprint mode.

Disabled—No PMC buttons appear 
highlighted; you cannot activate the 
channel.

Unassigned—No PMC buttons appear 
highlighted; you cannot activate the 
channel.

Listen-only—The PTT channel appears 
dimmed; you can listen but not talk.

Secure—The secure indicator displays 
and all PMC buttons are functional.

Channels may include visual indicators, 
such as labels, channel types, channel 
selector buttons, and specific colors to 
provide unique identification.

The PMC must be in focus when you 
transmit via the All Talk or PTT buttons.

PMC channels include these indicators:

Receive indicator—When you receive 
traffic, this indicator blinks green and 
remains illuminated for several seconds 
after the receive transmission has 
ended. Monitor this indicator for PMC 
traffic before you talk.

Transmit indicator—When you 
transmit, the PTT channel button 
highlights and changes color. On the 
radio console and touch screen skins, an 
indicator blinks red when you transmit.

When you use Cisco Security Agent (CSA) 
with the PMC, you may be prompted for 
access permission for various operations.

When prompted, always click Yes to 
grant permission and continue with 
your current operation.

Make sure that you do not allow CSA 
to time-out based on its default value of 
No or you will not be able to transmit.

To access the PMC online help, click 

the Menu button that displays on the PMC; 
then click Help.