Matrix ETERNITY NE System Manual
233
The number of simultaneous SIP calls depends on the number of simultaneous calls allowed by the ITSP
with whom you have subscribed this SIP Trunk.
The ETERNITY NE supports 8 simultaneous calls. Ask your ITSP about the number of simultaneous SIP
calls supported on this SIP Trunk. Configure this parameter only if the ITSP supports less than 8
simultaneous calls.
Symmetric RTP
3.
The use of Symmetric RTP makes it possible for a SIP device to send the RTP on the same connection on
which it is listening for RTP. This is done only on peer-to-peer SIP trunks.
Select the check box
Use Symmetric RTP
, if the ETERNITY NE is located on a public IP and you want
outgoing calls to the SIP Client located behind the NAT Router. OR if you need to receive incoming calls
from the SIP Client located behind the NAT router.
Digest Authentication
4.
The Digest Authentication feature allows incoming calls from callers only after the callers have
authenticated themselves (with their User ID and Password). If a caller enters invalid authentication
information, the system will re-challenge authentication once and reject the call, if the authentication
attempt fails again.
If you want to enable the 'Digest Authentication' feature on the SIP trunk,
•
Select the check box
Digest Authentication
. Default: disabled.
•
Configure the Digest Authentication Table. To do this,
•
Click the arrow icon.
•
The Digest Authentication Table page opens in a new window.
•
Enter the User ID to be authenticated along with its corresponding Password against each Index on
the Table.
•
The User ID may be a maximum of 40 characters. The User Password may be a maximum of 16
characters.
•
If you have finished entering the User IDs and their corresponding User Passwords in this Table,
click
Submit
.
•
Close the window.
Default Transport for Outgoing Messages
1.
Select the
Default Transport for Outgoing Messages
from the following options:
•
UDP:
Outgoing messages are transported using UDP.
•
TCP:
Outgoing messages are transported using TCP.
•
TCP (Fallback to UDP):
TCP is used for outgoing messages. However, if the TCP connection fails, the
system will attempt to send the message again over UDP.
Default: UDP
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