Revox Re:source MMM User Manual
Page 42

Multi Media
Re:source
41
Network: Questions & Answers
N
ETWORK IS OK BUT THERE IS NO
SOUND
.
You should be aware that the 
MMM cannot support all data 
formats that are available on the 
Internet. It can occur that a station 
cannot be played. See Technical 
data 
 
Other reasons why your Internet 
Radio doesn't play: 
• Not all radio stations broadcast
24/7
• Radio stations may not be
available any more
• The Revox equipment is muted
• The provider's (Radio Sender/
Provider) server capacity is fully 
utilised 
Transmission within your network 
breaks down because: 
• (Internet) network problems
• Server capacity fully utilised
N
ETWORK QUESTIONS
/
TIPS
 
The connection is lost after a 
few minutes: 
This is a system-based 
characteristic of the UPnP 
standard. Active communication 
starts on a port with a number 
higher than 1024 and then changes 
regularly during operation. Not all 
firewall programs recognise this 
knocking on different doors as a 
continuous connection. Depending 
on the configuration, the firewall 
may decide against an unknown 
client in case of doubt. 
Depending on the firewall software, 
this can be resolved through the 
following actions: 
 
• By using a fixed IP and without
DHCP, define the MMM as a so-
called Trusted Host, i.e. a device 
from which all communication is 
considered to be trustworthy. 
• Allow the server to accept
incoming and outgoing 
communication with the MMM 
over ports 1024 - 65535. 
Activate the exception setting for 
"UPnP Framework", e.g. Windows 
XP Firewall or activate "Permit 
UPnP communication". 
 
