Nortel Networks Mediant TP-1610 SIP User Manual
Page 92
Mediant 2000 SIP
Mediant 2000 SIP User’s Manual
92
Document #: LTRT-72504
Table
6-1: Basic, Logging, Web and RADIUS Parameters (continues on pages 90 to 97)
ini File Field Name
Web Parameter Name
*
Valid Range and Description
BaseUDPport
[RTP Base UDP Port]
Lower boundary of UDP port used for RTP, RTCP (Real-Time Control Protocol) (RTP
port + 1) and T.38 (RTP port + 2). The upper boundary is the Base UDP Port + 10 *
(number of gateway’s channels).
The range of possible UDP ports is 4000 to 64000.
The default base UDP port is 6000.
For example:
If the Base UDP Port is set to 6000 (the default) then:
The first channel uses the following ports: RTP 6000, RTCP 6001 and T.38 6002,
the second channel uses: RTP 6010, RTCP 6011 and T.38 6012, etc.
Note:
If RTP Base UDP Port is not a factor of 10, the following message is
generated: "invalid local RTP port".
For detailed information on the default RTP/RTCP/T.38 port allocation, refer to
Section
on page
202
.
IPDiffServ
[RTP IP Diff. Serv]
Diff Serv Code Point (DSCP) value that is assigned to the RTP packets. The DSCP
value is used by DiffServ compatible routers to prioritize how packets are sent. By
prioritizing packets, the DiffServ routers can minimize the transmission delays for
time sensitive packets such as VoIP packets.
The valid range is 0 to 63. The default value is 0.
Note:
The parameter IPDiffServ mustn’t be used simultaneously with the parameters
IPTOS and IPPrecedence.
IPPrecedence
[RTP IP Precedence]
Value that is assigned to IP Type Of Service (TOS) field in the IP header for all RTP
packets sent by the VoIP gateway.
The valid range is 0 to 15. The default value is 0.
Note:
The parameters IPTOS and IPPrecedence mustn’t be used simultaneously
with the parameter IPDiffServ.
IPTOS
[RTP IP TOS]
Value that is assigned to the IP Precedence field in the IP header for all RTP
packets sent by the VoIP gateway.
The valid range is 0 to 7. The default value is 0.
Note:
The parameters IPTOS and IPPrecedence mustn’t be used
simultaneously with the parameter IPDiffServ.
MaxEchoCancellerLength
and
EchoCancellerLength
Note:
Both parameters must be
set to the same value.
Maximum Echo Canceler Length in msec:
0 = Internal decision to keep max channel capacity (currently 32 msec)
4 = 32 msec
11 = 64 msec
22 = 128 msec
The default value is 0.
Note 1:
When set to 64 msec or more, the number of available gateway channels is
reduced (by a factor of 5/6).
For example:
Gateway with 8 E1 spans capacity is reduced to 6 spans (180 channels), while
gateway with 8 T1 spans capacity remains the same (192 channels).
Note 2:
The gateway must be reset after the value of ‘MaxEchoCancellerLength’ is
changed.
ECHybridLoss
Sets the four wire to two wire worst case Hybrid loss, the ratio between the signal
level sent to the hybrid and the echo level returning from the hybrid.
0 = 6 dB (default)
1 = 9 dB
2 = 0 dB
3 = 3 dB