Matrix SETU ATA211 V1 System Manual 139
• Server Address: Enter STUN Server Address if STUN is enabled. Server Address can be of maximum 40
characters. All ASCII characters are allowed. By default, STUN server address is blank. Refer chapter
“SIP Accounts”.
• Server Port: Enter STUN Server's listening port. Valid range of Server Port is from 1024 to 65535.
By default, the value is 3478.
Use SIP Port fetched using STUN?
If the ATA211 is located behind the NAT router and you have forwarded the SIP listening port of the
ATA211 in the router to the ATA211, you do not need to use the port provided by STUN server as SIP
listening port.
Hence, set this field to 'No' in those scenarios. Else, set this field to 'Yes' if you have not forwarded the 'SIP
port in the router' to the ATA211. When the flag is set to 'No', the ATA will use the Local Programmed SIP
listening port in SIP signaling.
When the flag is set to 'Yes', the ATA will use the port provided by the STUN server as SIP listening port in
SIP signaling. By Default it is programmed as 'Yes'.
VLAN/CoS (Layer2)
VLAN is defined as: 'When switch creates multiple broadcast domains by putting some of its interfaces in one
broadcast domain and other interfaces into other broadcast domain, then each broadcast domain is referred to
Virtual LAN (VLAN)'.
This feature allows the ATA to add VLAN header (Layer2 VLAN header), in the packets leaving the WAN port of the
ATA. VLAN Tag will be added in all the packets relayed from LAN to WAN port of ATA. The VLAN header includes
following information:
•VLAN ID
• Class of Service (CoS) (Layer2 or L2)
VLAN ID is the Identifier, assigned to each physical port of switch, to segment the LAN into Virtual LAN.
Quality of Service (QoS) on Layer2 is referred to 'Class of Service (CoS)' which is defined by IEEE 802.1P. ATA
supports CoS for SIP and RTP packets. The system user should program different CoS bits for SIP packets and
RTP packets, since priory of SIP and RTP packet is different due to real time nature of RTP packets.
To achieve this feature, flag is provided to enable/disable VLAN/CoS (Layer2).
The system user should configure following parameters for VLAN feature in ATA.
• Enable VLAN/CoS?: It allows enabling or disabling the, 'VLAN /CoS' feature for the ATA.
Select 'Yes' if the system should add VLAN header in packets generated by ATA so that user can use the
VLAN feature. Select 'No' if the system should not support VLAN feature. By default it is No.
Admin or User can also use command to enable or disable VLAN/CoS. It will be useful in following
scenario:
Suppose, you have enabled the VLAN and set the VLAN ID to 2, this will result in configuring the Jeeves
from PC which resides in VLAN 2. Now if you have no PC which resides in VLAN 2, you will not be able to
access Jeeves from WAN Port for further configuration. Hence using this command, you can first disable
L2 VLAN/CoS and then access Jeeves.
Both Admin and User can issue the command from SLT to enable/ disable L2 VLAN/ CoS as explained
below:
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