S-Series IP PBX Administrator Guide
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Table 9-7 External Host Configuration Parameters
Option
Description
External Host
Alternatively you can specify an external host, and the
system will perform DNS queries periodically.
This setting is only required when your external IP address
is not static. It is recommended that a static public IP
address be used with this system. Please contact your ISP
for more information.
External Refresh Interval
If an external host has been supplied, you may specify how
often the system will perform a DNS query on this host.
This value is specified in seconds.
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 are as follows:
“192.168.0.0/255.255.0.0”,
“10.0.0.0/255.0.0.0”,
and
“172.16.0.0/12”.
NAT Mode
Global NAT configuration for the system. The options are
as follows:
Yes: use NAT and ignore the 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.
Codec
A codec is a compression or decompression algorithm that used in the transmission of voice packets
over a network or the Internet. S-Series supports G711 a-law, u-law, GSM, H261, H263, H263P,
H264, SPEEX, G722, G726, ADPCM, G719A, MPEG4 and iLBC.
Note:
If you would like to use G.729, please enter your license. The system 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".
