MyPBX U300 Administrator Guide
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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.
3) Codecs
A codec is a compression or decompression algorithm that used in the transmission of
voice packets over a network or the Internet.
MyPBX U300 supports G711 a-law, u-law, GSM, SPEEX, G722, G726, G729A,
ADPCM, MPEG4, SPEEX, H261, H263, H263P, H264.
Note:
If you would like to use G.729, please enter your license. Our device have embedded
the G729, you can test it directly withoutpurchasing 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 17-1 SIP Settings-Codecs
4) QoS
QoS (Quality of Service) is a major issue in VoIP implementations. The issue is how
to guarantee that packet traffic for a voice or other media connection will not be
delayed or dropped due interference from other lower priority traffic. When the
network capacity is insufficient, QoS could provide priority to users by setting the
value.
Figure 17-2 Qos Settings
