Shanghai New Rock Technologies Inc. Page53/75
Name
Description
RTP drop SID
Determine whether to discard received RTP SID voice packets. By
default, SID voice packets will not be dropped.
Note: RTP SID packets should be dropped only when they are in
unconformity to the specifications. Nonstandard RTP SID data could
generate noise for calls.
RTP destination
address
The default value is from SDP media connection.
z
From SDP global connection: Obtain the peer IP address from SDP
global connection;
z
From SDP media connection: Obtain the peer IP address from
Connection Information behind SDP Media Description.
FoIP
Select fax mode: T.38 or T.30
Jitter buffer
Set the extent of T.38 jitter buffer, and the default is 250. The valid
range is 40 ~ 1000 in milliseconds.
Receiving port for
FoIP
Set whether to open a new port when the OM is switching to T.38 mode,
and by default, original voice port will be used.
z
Open a new port: Use the new RTP port;
z
Use original voice port: Use the original RTP port that created on call
set.
ECM
Determine whether to use corrective mode of fax. By default, it is not
selected.
V21 Signal detection
Select if V21 signal detection is used when T.38 faxes. The default
value is “Not Select”.
Receive gain
Set the receiving gain of T.38 fax, with the default of -6dB.
Transmit gain
Set the transmission gain of T.38 fax, with the default of 0dB.
Packet size
Set the packet size of T.38. 30 milliseconds is the default value.
Redundancy
Set the number of the redundant frames in T.38 data package, default is
4.
PSTN failover
Network fault routed
to analog trunk
In the case of network fault, outgoing calls are automatically routed to
FXO port. The default value is “Select”.
Table 2-23
Codec Methods Supported by OM
Codec Supported by OM
Bit Rate (Kbit/s)
Time Intervals of RTP Package
Sending (ms)
G729A 8
10/20/30/40
PCMU/PCMA 64
10/20/30/40
Table 2-24
Mapping between the reliability requirement and the TOS value
Level
TOS Value (High Delay
and High Throughput)
TOS Value (Low Delay
and Low Throughput)
TOS Value (Low Delay
and High Throughput)
0
0x08 0x10 0x18
1
0x28 0x30 0x38
2
0x48 0x50 0x58
3
0x68 0x70 0x78
