9
4.1.2 Configuration DIP Switch Set “S3”
Use the DIP Switches in Switch S3 to set the DTE Rate (for LAN
Bandwidth Allocation), the transmit data sampling point and to reset
the unit to its software default settings. The following table summa-
rizes default positions of DIP Switch S3. Detailed descriptions of each
switch follow the table.
Switch S3-1 through S3-6: DTE Rate
Use Switch S3-1 through S3-6 to provision bandwidth to the LAN
in 64kbps increments up to 1.152Mbps. Peak bandwidth utilization on
the local domain on an Ethernet LAN runs typically between 15% to
20% (1.5Mbps to 2Mbps) of the maximum bit rate of 10Mbps. Traffic
between LANs typically runs even lower -- between 2% to 7%
(200kbps to 700kbps) of the maximum bit rate depending upon appli-
cation and environmental conditions. This is the amount of traffic that
will run across the DSL span.
Set Switches 3-1 through S3-6 to allocate bandwidth based upon
expected LAN to LAN traffic rates. As an example, set applications
which low LAN to LAN bandwidth content between 64kbps and
576kbps. Applications with high bandwidth LAN to LAN content should
be set between 576kbps and 2.304Mbps as required.
S3-1
S3-2
S3-3
S3-4 S3-5 S3-6
DTE Rate (kbps)
Off
Off
On
On
On
On
64
On
On
Off
On
On
On
128
Off
On
Off
On
On
On
192
On
Off
Off
On
On
On
256
Off
Off
Off
On
On
On
320
On
On
On
Off
On
On
384
Off
On
On
Off
On
On
448
On
Off
On
Off
On
On
512
Off
Off
On
Off
On
On
576
On
On
Off
Off
On
On
640
Off
On
Off
Off
On
On
704
On
Off
Off
Off
On
On
768
Off
Off
Off
Off
On
On
832
On
On
On
On
Off
On
896
Off
On
On
On
Off
On
960
On
Off
On
On
Off
On
1024
Off
Off
On
On
Off
On
1089
On
On
Off
On
Off
On
1152
Switch S3-7: Reset Software Defaults
Use Switch S3-7 to reset the software configured factory defaults.
This feature is applicable only using the Model 1001MC to SNMP
manage your units. For more information, please refer to the Model
1001MC Operations Manual.
S3-7
Setting
On
Normal Operation
Off
Reset
Switch S3-8: Reserved
Switch S3-8 is reserved for factory use and must remain in the On
position.
10
S3 SUMMARY TABLE
Position
Function
Factory Default
S3-1
DTE Rate
On
S3-2
DTE Rate
Off
S3-3
DTE Rate
Off
S3-4
DTE Rate
Off
S3-5
DTE Rate
On
S3-6
DTE Rate
On
S3-7
Reset Software Defaults
On
Normal Operation
S3-8
Reserved
On
}
768 kbps
NOTE:
The Model 1089 will automatically select the optimum
line rate for the required distance based on the DTE rate set by
Switches S3-1 through S3-6. This selection is based on the low-
est line rate that will support the DTE rate.
