N824 User Manual
88
Local Network
Identification
Used to identify the local network using a network number/subnet
mask pair when the system is behind a NAT or firewall.
Some examples of this are as follows:
―192.168.0.0/255.255.0.0‖: all RFC 1918 addresses are local
networks;
―10.0.0.0/255.0.0.0‖: also RFC1918;
―172.16.0.0/12‖: another RFC1918 with CIDR notation;
―169.254.0.0/255.255.0.0‖: zero conf local network.
Please refer to RFC1918 for more information.
NAT Mode
Global NAT configuration for the system; the options for this
setting are as follows:
Yes = Use NAT. Ignore address information in the SIP/SDP
headers and reply to the sender's IP address/port.
No = Use NAT mode only according to RFC3581.
Never = Never attempt NAT mode or RFC3581 support.
Route = Use NAT but do not include rport in headers.
Allow RTP Re-invite
By default, the system will route media steams from SIP
endpoints through itself. Enabling this option causes the system
to attempt to negotiate the endpoints to route packets to each
other directly, bypassing the system. It is not always possible for
the system to negotiate endpoint-to-endpoint media routing.
Codecs
A codec is a compression or decompression algorithm that used in the transmission of
voice packets over a network or the Internet. N824 supports G711 a-law, u-law, GSM,
SPEEX, iLBC, G722, G726, G729A,G729B and G729AB,
Note:
If you would like to use G.729, please enter your license. Our device have embedded
the G729, you can test it directly without purchasing license. But for copyright
protection, we suggest you to buy it after testing it successfully. After you buy the
license from DIGIUM, you should enter G729 license at the "G729 License Key".
Figure 18-1 SIP Settings-Codecs
