Nat And Stun Parameters - AudioCodes E-SBC User Manual

CHAPTER 68 Configuration Parameters Reference
'Gold QoS'
gold-qos
[GoldServiceClassDiffServ]
'Bronze QoS'
bronze-qos
[BronzeServiceClassDiffServ]

NAT and STUN Parameters

The Network Address Translation (NAT) and Simple Traversal of UDP through NAT (STUN)
parameters are described in the table below.
Parameter
STUN Parameters
NAT Parameters
'NAT Traversal'
configure voip >
media settings >
disable-NAT-traversal
[NATMode]
Parameter
Table 68-14:NAT and STUN Parameters
Enables the NAT traversal feature for media when the device
communicates with UAs located behind NAT.
■ [0] Enable NAT Only if Necessary = NAT traversal is
performed only if the UA is located behind NAT:
✔
✔
Note: If the SIP session is established (ACK) and the
device (not the UA) sends the first packet, it sends it to
the address obtained from the SIP message and only after
the device receives the first packet from the UA does it
determine whether the UA is behind NAT.
■ [1] Disable NAT = (Default) The device considers the UA
as not located behind NAT and sends media packets to
the UA using the IP address:port specified in the SDP 'c='
line (Connection) of the first received SIP message.
■ [2] Force NAT = The device always considers the UA as
behind NAT and sends the media packets to the IP
address:port obtained from the source address of the first
media packet received from the UA. The device only
sends packets to the UA after it receives the first packet
from the UA (to obtain the IP address).
Mediant 1000 Gateway & E-SBC | User's Manual
Description
Note: If the feature is configured for a specific
profile, the settings of this global parameter is
ignored for calls associated with the profile.
Defines the DiffServ value for the Gold CoS
content (Streaming applications).
The valid range is 0 to 63. The default is 26.
Defines the DiffServ value for the Bronze CoS
content (OAMP applications).
The valid range is 0 to 63. The default is 10.
Description
UA behind NAT: The device sends the media
packets to the IP address:port obtained from the
source address of the first media packet received
from the UA.
UA not behind NAT: The device sends the packets to
the IP address:port specified in the SDP 'c=' line
(Connection) of the first received SIP message.
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