and send remote ringback tone to remote side.
- No. It sends 180 SDP message to the origination, and
doesn’t send remote ringback tone to remote side.
Only FXS port can play ring back tone to remote.
FXO port send Ring
Back signal
When FXO port get call request, it will send 18X signal
right now. if it is no, then it connect to PSTN first, after the
pstn side pick up, it send the 18X message, and connect the
calls. It is used for billing purpose.
- Yes
- No
It only work for FXO port. On FXS port, it always send alert
signal.
Yes
Enable
RFC2833
Negotiation
Yes or No. Set the DTMF secondary dialing transmission
negotiate with RFC 2833 or not.
Yes
Interdigit Timeout
If exceeded the value, system will consider that user has
finished dialing. The range is 1 ~ 20s
5
Table 22
SIP
PARAMETERS
DESCRIPTION
Notice the modification of parameters marked by *, such as “Local
Port” , “enable Encryption” only take effect after save and reoot.
“Send local ringback tone” of SIP protocol in the old version, may
have differences compared with old version, which will not be pinted out
here one by one.
5
5
.
.
3
3
.
.
2
2
P
P
o
o
r
r
t
t
5
5
.
.
3
3
.
.
2
2
.
.
1
1
H
H
.
.
3
3
2
2
3
3
p
p
r
r
o
o
t
t
o
o
c
c
o
o
l
l
Fig 18
H.323 Port Configuration Diagram
