Using Your Conference Phone in PSTN Mode
Polycom, Inc.  39
 
To set an audio type:
1 Press  , and then select Features > 2.5mm Mode.
2 From the 2.5mm Mode screen, select one of the following:
— Mobile Phone Audio Choose this option if you want your 
conference phone to automatically assume a mobile phone is attached 
when a cable is connected to your conference phone’s 2.5mm audio 
connector.
— Computer Audio Choose this option if you want your conference 
phone to automatically assume a computer is attached when a cable is 
connected to your conference phone’s 2.5mm audio connector.
Listening to Mobile Phone or Computer Audio
Before you can listen to mobile phone or computer audio on your conference 
phone, you have to answer a mobile phone or computer call using your mobile 
phone or computer calling application interface. As well, you have to make 
sure one of the optional cables connects your mobile phone or computer to 
your conference phone. How you listen to mobile phone or computer audio on 
your conference phone depends on if your conference phone is idle, has an 
active call, or has held calls.
Listening to Mobile Phone or Computer Audio When Your 
Conference Phone is Idle
If your conference phone is idle, ‘From: PC-Mobile audio’ displays in the 
center of the screen, as shown next. The mobile phone or computer audio 
automatically becomes the active call, and you can hear any audio associated 
with the mobile phone or computer calling application. If there isn’t any audio, 
you can wait for a call, answer it from your mobile phone or computer calling 
application, and then listen to the audio on your conference phone.
You mute and adjust the volume of mobile phone and computer calls the same way 
you control regular calls (see Changing the Speaker Volume on page 49 and 
Muting the Microphones on page 49).
Many computer calling applications automatically adjust the sound settings on your 
computer when you launch the application. If the volume from the 
SoundStation Duo is too high or too low, you may need to adjust your computer’s 
volume settings.