even
if
the
network
is
congested
with
other
traffic.
z
TOS
for
Signaling
Packets
:
Sets
TOS
for
SIP
packets.
z
TOS
for
RTP
audio
packets
:
Sets
TOS
for
RTP
audio
packets.
z
TOS
for
RTP
video
packets
:
Sets
TOS
for
RTP
video
packets.
z
COS
Priority
for
Signaling
packets
:Sets
802.1p
priority
for
SIP
packets.
z
COS
Priority
for
RTP
audio
packets
:Sets
802.1p
priority
for
RTP
audio
packets.
z
COS
Priority
for
RTP
video
packets
:
Sets
802.1p
priority
for
RTP
video
packets.
z
DNS
SRV
Look
Up
:
Enable
DNS
SRV
lookups
on
outbound
calls.
z
Relax
DTMF
:
Relax
DTMF
handling.
z
RTP
TimeOut(sec)
:Terminate
call
if
there
is
60
seconds
of
no
RTP
or
RTCP
activityon
the
audio
channelwhen
we're
not
on
hold.
This
feature
enables
the
ability
tohangupa
call
in
the
case
of
a
phone
disappearing
from
the
network,
for
instanceif
the
phone
loses
power.
z
RTP
Hold
TimeOut(sec)
:
Terminate
call
if
300
seconds
of
no
RTP
or
RTCP
activity
on
the
audio
channelwhen
on
hold.
z
Add
‘user=phone’
to
URI
:
Enable
this
option
if
the
SIP
provider
requires
";user=phone"
on
URI.
z
UserAgent
:
Allows
you
to
change
the
user
agent
string.
The
default
user
agent
string
also
contains
the
Asteriskversion.
If
you
don't
want
to
expose
this,
change
theuseragent
string
here.
z
Premature
Media
:If
enabled,
SIP
channel
will
not
send
183
SessionProgress
for
early
media.
Before
enabling
premature
media
make
sure
thatprogressinband
is
configured
as
never.
z
Progress
Inband
:Sets
the
SIP
channels
to
use
inbandsignaling
or
not.
Outbound
SIP
Registrations
The
“Outbound
SIP
Registrations”configures
the
register
behaviorsofCooVox
IPPBX
system
when
registering
as
a
client
to
the
other
SIP
servers.