IP 200 User Manual
Page 49 of 72
•
Local SIP Port:
Enter the local SIP Port number on which ATA should listen for
messages. The range is 1 to 65535. The default port is 5060.
•
Media Base Port:
Enter the Media Base Port (also known as RTP port) number.
This parameter provides the base value from the media (RTP) ports that are
assigned for various lines and the different call-sessions that may exist within an
end-point. Odd port values are not recommended. If an Odd Value is entered,
the next higher even value is used as the Media Base Port. This is to conform to
the RFC specifications. The range is 1 to 65500. The default port is 5000.
NAT Traversal Parameters:
This section configures for the NAT Traversal technique
support in ATA.
•
NAT Traversal Technique: Select USE STUN
to enable STUN (default) if the ATA is
behind a NAT enabled router and the router has no ALG for SIP, or
NONE
to
disable STUN (ATA is not to use STUN for NAT traversal). ATA also supports a
proprietary implementation of NAT traversal where the Service provider is
expected to provide some relay support. If
NONE
is selected, then based on
the responses received, the ATA will dynamically determine if the SIP Server
supports the proprietary implementation.
Note: Even when STUN is enabled, the ATA does an automatic detection of the
presence of SIP ALG and disables the use of STUN. This is to avoid some media
problems arising out of the behavior of some ALGs when STUN is used at the user
end.
•
STUN Server:
Enter the IP address or Domain Name of the STUN Server. The
default is 66.7.238.210. This field is applicable only if USE STUN is selected as the
NAT traversal technique.
•
STUN Port:
Enter the port number on which the STUN server listens for requests
from the STUN Client on ATA. The range is 1 to 65535. The default is 3478. This
field is applicable only if USE STUN is selected as the NAT traversal technique.
•
Force Keep Alive:
Only valid when STUN is not used. If STUN is not enabled, and
keep alive is still expected to be sent then select
Yes
otherwise select
No
.
•
Keep Alive Period:
The keep alive interval in seconds to be used when STUN is
not enabled.
Special Service:
This section configures the following information:
•
Auto Obtain Extension:
•
Auto Update Parameter:
Codec Preference:
This section determines the order in which supported codecs will
be placed in a call setup message sent to any destination line. It also helps
determine the selected codec when a message indication for an incoming call is
received from the remote end with codec preference information.
•
G711U:
Select the priority 1 through 7 to be assigned to the G711U codec, or
NONE if the G711U codec is not to be used.
•
G711A:
Select the priority 1 through 7 to be assigned to the G711A codec, or
NONE if the G711A codec is not to be used.
•
G729A:
Select the priority 1through 7 to be assigned to the G729A codec, or
NONE if the G729A codec is not to be used.
•
G726-16:
Select the priority 1 through 7 to be assigned to the G726-16 codec,
or NONE if the G726-16 codec is not to be used.
•
G726-24:
Select the priority 1 through 7 to be assigned to the G726-24 codec,
or NONE if the G726-24 codec is not to be used.
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