AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 765)

A-34 41-001343-01 Rev 03, Release 3.2.2
SIP STUN Parameters
Parameter –
sip stun ip Aastra Web UI: Advanced Settings->Network->
Advanced Network Settings
Configuration Files aastra.cfg, <model>.cfg, <mac>.cfg
Description IP address and/or qualified domain name of the STUN server (also
know as Simple Traversal of UDP through NAT).
STUN is a protocol that governs the exchange of data over a UDP
connection by communication devices operating behind a NAT or
firewall. Since the behaviors of NATs can be different, the STUN
protocol allows the exchange of data to be consistent over any type of
NAT.
The STUN/TURN configuration is only used for media (RTP traffic) that
goes through the server - not for signaling. (For signaling, you need to
enable Rport if the NAT device does not recognized SIP).
The STUN/TURN configuration applies globally to each phone.
If you configure both STUN and TURN on the phone, it discovers what
type of NAT device is between the phone and the public network. If the
NAT device is full cone, restricted cone, or port restricted cone, the
phone uses STUN. If the NAT device is symmetric, the phone uses
TURN. If you configure STUN only, the phone uses STUN without the
NAT discovery process.
Notes:
1. The NAT IP configuration parameter takes precedence over the
STUN and TURN parameters.
2. STUN does not work if the NAT device is symmetric.
Format IP Address or Fully Qualified Domain Name (FQDN)
Default Value 0.0.0.0
Range Two (2) IP addresses or domain names separated by a comma
Note: The first is the primary and the second is the backup.
Example sip stun ip: 10.50.103.12, stunbackup.aastra.com
Parameter –
sip stun port Aastra Web UI: Advanced Settings->Network->
Advanced Network Settings
Configuration Files aastra.cfg, <model>.cfg, <mac>.cfg
Description Port number of the STUN server (also know as Simple Traversal of
UDP through NAT)
Notes:
1. The NAT IP configuration parameter takes precedence over the
STUN and TURN parameters.
2. STUN does not work if the NAT device is symmetric.
Format Integer
Default Value 3478
Range 0 to 65535 (One (1) or two (2) port numbers separated by a comma)
Note: The first is the primary and the second is the backup.
Example sip stun port: 3478,3479