User Manual

98
Property
Type
Values
Default Value
Description
voip.auto-update-
nat
BOOLEAN
0 : Disable NAT
1 : Enable NAT
1
Configure whether SIP traversal behind NAT is disabled. Used for
device behind a symmetric NAT (Network Address Translation).
When enabled, the device will keep track of the public IP address
from the response of the REGISTER request. If it detects that the
address has changed, it will unregister the current Contact, update
the Contact with the transport address obtained from the Via
header, and register a new Contact to the SIP registrar. This option
will also update the public name of the UDP transport if STUN is
configured.
voip.dtmf-method
TEXT
0 : RTP -- RFC2833
1 : SIP INFO
2 : In-band
0
DTMF signaling method.
voip.dtmf-rtp-
payload-type
TEXT
96..127
96
Specify the dynamic RTP payload type for DTMF transport using
RTP.
voip.media-
onhold-method
BOOLEAN
0 : M line only -- RFC3264
1 : M and C line -- RFC2543
0
The Media on Hold method setting allows switching the Media on
Hold behavior between the different RFC definitions. 'M line only
(RFC3264)' (0) implements the functionality according to RFC3264.
In the INVITE message SDP body, the attribute 'a=sendonly' is set
to a designated media stream to put media on-hold. 'M and C line
(RFC2543)' (1) implements the functionality according to RFC2543.
In the INVITE message SDP body, the connection line ip is set to
'0.0.0.0' (e.g. 'c= IN IP4 0.0.0.0'), and the attribute 'a=inactive' is
added.
voip.use-srtp
INDEXED_
OPTION
0 : Disabled -- Do not use SRTP;
always use RTP
1 : Optional -- Use the optional
disposition for SRTP in SDP; if the
remote end supports SRTP then
use SRTP; otherwise use RTP
2 : Mandatory -- Force use of
SRTP; if the remote end does not
support SRTP the call does not
connect
0
Controls Secure Real-time Transport Protocol (SRTP) usage.