Unfortunately  not  many  other  manufacturers  provide  this  facility. Additionally 
when the PC image is previewed its associated audio is only heard at the local site. 
Echo cancellation is appropriately disabled on this input.  
 
System control is normally through the wired remote but if preferred  a Polycom 
standard infra red control may be used.  Remote configuration is another option via 
a web browser from a network connected PC.  This comprehensive web interface 
provides  control  and  configuration  of  the  CODEC  and  displays  diagnostic 
information  if  required,  together  with  web  snapshots  of  near  and  far  sites.    For 
added security this remote management system may be password protected.  For 
connection  to  a  room  control  system  etc.  an  RS232  serial  control  port  is  also 
provided.  
 
 
D: SYSTEM OPERATION 
The remote control panel includes dedicated controls for Dial, Hang up, Directory, 
Volume,  Microphone  mute,  Zoom,  Near/Far  and  Layout  together  with  cursor 
controls to navigate the on screen menus.  
 
The Content (PC) input signal is controlled via two buttons. The monitor preview 
button cycles between the PC input and the CODEC output, while the second 
button transmits or stops transmission of the PC image over the conference link to 
the remote site(s) 
 
The ‗Info‘ button has dual functions, providing context sensitive help when not in a 
call and a shortcut to Call Status information during a call.  
 
 
 
 
 HDX 4500 Remote Control Panel