7
3.1.1 Configuration DIP Switch Set “S1”
Use the eight switches in DIP Switch Set “S1” to configure the data
rate, asynchronous or synchronous data format, transmit clock source
and response to RDL request. The following table summarizes default
positions of DIP Switch S1. Detailed descriptions of each switch follow
the table.
Switches S1-1 and S1-2: Data Rate
Use Switches S1-1 and S1-2
with Switch S2-1
to configure the
Async or Sync bit rate for Model 1092A. The following table
summarizes default positions of DIP Switch S2. Detailed descriptions
of each switch follow the table.
S1 SUMMARY TABLE
Position
Function
Factory Default
S1-1
Data Rate
On
S1-2
Data Rate
Off
S1-3
DSR during Local Line Loop
On
DSR On
S1-4
SNMP Management
Off VT100 Mgmt
S1-5
Reserved
Off
S1-6
Tx Clock Source
On
S1-7
Tx Clock Source
On
S1-8
Response to RDL Request
On
Enable
64K Sync
}
}
Internal Clock
S1-1
S1-2
S2-1
Sync Data Rate
Async Data Rate
On
On
Off
32 kbps
Reserved
Off
On
Off
56 kbps
Reserved
On
Off
Off
64 kbps
Reserved
Off
Off
Off
128 kbps
0-38.4 kbps
On
ON
On
Reserved
Reserved
Off
On
On
Reserved
Reserved
On
Off
On
Reserved
Reserved
Off
Off
On
19.2 kbps
Reserved
Possible Bit Rate Settings -
Switch S1-1, S1-2 and S2-1
8
Switch S1-3: Data Set Ready During Line Loopback Test
Use Switch S1-3 to control the behavior of the DSR signal at the
EIA interface during the line loopback test.
S-3
Setting
On
DSR is on during local line loop
Off
DSR is off during local line loop
Switches S1-4: Management Setting
When setting the 1092A to SNMP Management, the DTE rate switches
(S1-1, S1-2, and S2-1) are also needed to be at the ON position.
Therefore, to set a 1092A unit SNMP management mode, the following
switches have to be at the ON position, S1-1, S1-2, S2-1, and S1-4.
Use Switch S1-4 to configure the 1092A’s management setting.
S1-4
Setting
On
SNMP Management
Off
Control Port Management
Switches S1-5: Reserved
Always at off position
Switches S1-6 and S1-7: System Clock Mode
Use Switches S1-6 and S1-7 to configure the 1092A for internal,
external, or receive recover clock mode.
S1-6
S1-7
Clock Mode
Description
On
On
Internal
System clock
generated internally
Off
On
External (DTE)
System clock derived
from terminal interface
On
Off
Receive Recover
System clock derived
from the received line
signal.
Off
Off
Hardware Reset
Reset to use hardware
switches for
configuration