MAXINCOM MUC1004 Administrator's Manual page 79

usereqphone
User agent
3.8.1.2 Network
Note: Configuration of this section is required when using remote extensions
generally.
Figure 3.8.1.2 SIP Network Configuration
Table 3.8.1.2 Description of SIP Network Configuration
Parameters
Enable STUN
STUN Address
External IP
Address
Http://www.maxincom.com
MUC1004/2008/2016 Administrator guide
This provider requires,User=phone on URI
To change the user agent parameter of asterisk, the
default is "PBX", you can change it if needed.
STUN (Simple Traversal of UDP through NATs) is a
protocol for assisting devices behind a NAT firewall or
router with their packet routing.
The STUN server allows clients to find out their public
address, the type of NAT they are behind and the
internet side port associated by the NAT with a
particular local port. This information is used to set up
UDP communication between the client and the VOIP
provider and so establish a call.
The IP address that will be associated with outbound SIP
messages if the system is in a NAT environment.
Description
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