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70 TAU-72.IP/TAU-36.IP Universal Network Terminal
1.
To use a local DNS, leave DNS field in
'Network/Network settings'
tab blank or enter the value 127.0.0.1.
2.
In
'Network/Hosts'
tab, enter the mapping of a host (SIP domain) to actual IP addresses of SIP proxy/SIP
registrar.
3.
In
'PBX/SIP-H323 Profiles/Profile
n
/SIP Custom'
tab, specify domains for each pair of SIP proxy and SIP
registrar.
4.
Enable routing via SIP proxy by selecting
outbound
checkbox in
'PBX/SIP-H323 Profiles/Profile
n
/SIP
Custom'
tab, or entering prefixes in '
PBX/SIP-H323 Profiles/Profile
n
/Dialplan (Dialplan table)' tab.
If you
configure prefixes, select SIP proxy protocol in
'Protocol&Target'
field.
5.1.2.2.4
Codecs Configuration (Profile N Codecs)
In
'Profile n
/
Codecs'
submenu, you may configure codecs used in the current profile.
TAU signal processor encodes analogue voice traffic and fax/modem data into digital signal and performs
its reverse decoding. Gateway supports the following codecs: G.711A, G.711U, G.729, G723.1, G.726-32.
G.711 is PCM codec that does not employ a compression of voice data. This codec must be supported by
all VoIP equipment manufacturers. G.711A and G.711U codecs differ from each other in encoding law (А-law is a
linear encoding and U-law is non-linear). The U-law encoding is used in North America, and the A-law
encoding—in Europe.
G.723.1 is a voice data compression codec, allows for two operation modes: 6.3kbps and 5.3kbps. G.723.1
codec has a voice activity detector and performs comfort noise generation at the remote end during period of
silence (Annex A).
G.723.1 codec is used together with 'Silence compression' setting. When the setting is enabled,
Annex A support is enabled, otherwise it is disabled.
G.726-32 is a voice data compression codec that uses ADPCM compression algorithm at the rate of
32kbps.
G.729 is also a voice data compression codec with the rate of 8kbps. As with G.723.1, G.729 codec
supports voice activity detector and performs comfort noise generation (Annex B).
T.38 is a standard for sending facsimile messages in real time over IP networks. Signals and data sent by
the fax unit are copied to T.38 protocol packets. Generated packets may feature redundancy data from previous
packets that allows to perform reliable fax transmissions through unstable channels.
You don't have to reboot the gateway in order to apply codec settings.
When applying settings, all current calls will be terminated!!!
In
'Codecs configuration'
section, you may select codecs and an order of their usage on connection
establishment. Codec with the highest priority should be placed in top position. Click the left mouse button to
highlight the row with the selected codec. Use arrow buttons
(up, down) to change the codec priority.
—
Use G.711A
—use G.711A codec.
—
Use G.711U
—use G.711U codec.
—
Use G.723
—use G.723.1 codec.