41-001343-01 Rev 02, Release 3.2.2
A-35
SIP TURN Parameters
Parameter
–
sip turn 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
TURN
server (also
known as Traversal Using Relay NAT).
TURN is a protocol that governs the reception of data over a
Transmission Control Protocol (TCP) or a UDP connection by a single
communications device operating behind a NAT or firewall. A TURN
server relays packets from an external IP address towards an internal
device only if that internal device has previously sent a packet through
the same TURN server to that particular external IP address.
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 TURN only, the phone uses TURN with the NAT
discovery process. TURN is compatible with all types of NAT devices
but can be costly since all traffic goes through a media relay (which can
be slow, can exchange more messages, and requires the TURN server
to allocate bandwidth for calls).
Note:
The NAT IP configuration parameter takes precedence over the
STUN and TURN parameters.
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 turn ip: 10.50.103.12, turnbackup.aastra.com
Parameter
–
sip turn port
Aastra Web UI:
Advanced Settings->Network->
Advanced Network Settings
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
Port number of the
TURN
server (also known as Traversal Using Relay
NAT).
Note:
The NAT IP configuration parameter takes precedence over the
STUN and TURN parameters.
Format
Integer
Default Value
3479
Range
0-65535 (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 turn port: 3479,3480
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