R&S XU 4200  Audio via VoIP (Optional) 
6166.5368.02.01 3.106   
3.15.2 Cabling 
Instructions 
1.  Connect the radio via the connectors X6 and X9 to the LAN network. 
 
Cabling 
 
 
 
 
 
 
 
 
 
Fig. 3.94  VoIP cabling. 
3.15.3 Configuration 
VoIP interface 
configuration using 
the R&S ZS 4200 
Use the Service and Maintenance Tool R&S ZS 4200 to configure the VoIP 
interface. 
1.  Set the “Select Audio Interface” parameter on the radio to “VoIP”. 
2.  Configure the “VoIP radio URI TX“. 
3.  Configure the “VoIP radio URI RX“. 
4.  Configure the “Emergency VoIP URI ACL”. 
5.  Configure the “Normal VoIP URI ACL”. 
6.  Configure the “TX Audio ALC VoIP” and adjust the 
“TX Audio Level VoIP” as required in your VoIP audio infrastructure. 
Note: The default settings (see chapter 3.3.1) ensures the compliance with 
the ED-137 requirement of 30 % AM modulation depth at −10 dBm0 audio 
level. If the VoIP infrastructure complies with the ED-137, the default value 
shall be left unchanged. 
 
7.  Configure the “VoIP PTT Summation Mode“. 
8.  Configure the “VoIP Jitter Buffer Prefetch Value”. 
9.  Configure the “RX Audio AGC VoIP” and adjust the 
“RX Audio Level VoIP” as required in your VoIP audio infrastructure. 
Note:  The default settings (see chapter 3.3.1) ensures the compliance 
with the ED-137 requirement of −10 dBm0 at 30% AM modulation depth. If 
the VoIP infrastructure complies with the ED-137, the default value shall be 
left unchanged. 
 
Transceiver
X9 
LAN 
VoIP + 
(Remote 
Control) 
X6
LAN 
VoIP + 
(Remote 
Control)