FAQ- NAT refresh timer

Valid for:

N530

N610

N670

N770

N870

N870E

Embedded Integrator

Virtual Integrator

Introduction

The device will send an empty SIP message with just 2 * CRLF to the platform in configurable time interval to keep the NAT firewall open.

New in software 2.42.0 or higher
UDP
- NAT refresh timer is set by default to 0 seconds
- Timer = 0 means feature is disabled
- Timer can be changed via auto-provisioning ("SipProvider.0.UDPKeepAliveTimerValue")
TCP
- Is activated automatically and set for 90 seconds
Feature is a platform related setting, if device has more SIP accounts, it does not send an UDP package per SIP account. It sends only one package every 20 seconds.
Nx70 will send UDP / TCP packages containing only 2 x CR,LF

192.168.178.29213.30.181.53UDP5060 → 5060 Len=4

Data (4 bytes)
Data: 0d0a0d0a
[Length: 4]

Auto-provisioning

provisioning template example

<?xml version="1.0" encoding="UTF-8"?>
<provisioning version="1.1" productID="e2">

<nvm>

</nvm>
</provisioning>

Web-interface

From software 2.53 or higher, we have added the UDP NAT refresh timer in the web-interface:

Go to: SETTINGS - Provider or PBX profiles - UDP keep-alive