Shenzhen
Ultrative
Technology
Co.,
Ltd.
T:
+86
‐
755
‐
29685231
E:
http://www.ultrative.cn
|
com
Add:
012#,
5/F,
Block
A,
Hedong
Bldg.,
Liutang
Rd.,
Xixiang
St.,
Bao
An
District,
Shenzhen,
China
Page
32
of
54
5.2
Call
ITEM
DECSRIPTION
Call
Do
Not
Disturb
Enable/Disable
Do
Not
Disturb
Anonymous
Call
Enable/Disable
anonymous
call.
Anonymous
Call
Rejection
Enable/Disable
anonymous
call
rejection.
Use
Session
Timer
Enable/Disable
refresh
session
function.
The
device
will
send
an
Invite
packet
to
refresh
the
session
during
a
call
if
it
enable.
Session
Timer
The
refresh
session
time
interval.
Call
Method
This
method
include
SIP
and
TEL.
DNS
‐
SRV
Enable/Disable
DNS
‐
SRV.
Allow
‐
events
Enable/Disable
Allow
‐
events.
Registered
NAT
Enable/Disable
Registered
to
NAT
UDP
Keep
‐
alive
Message
The
phone
periodically
sends
a
UDP
packet
to
keep
the
port
active
and
to
avoid
the
server
to
shut
down
the
port
UDP
Keep
‐
alive
Interval
Default
is
30
second.
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