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Switches S1-4 and S1-5: Asynchronous/Sync Operation
Use Switches S1-4 and S1-5 to configure the Model 1092 for
async/sync operation. Both switches must be set in the “Off” position.
There is no other valid setting.
S1-4
S1-5 Setting
Off Off Async/Sync
On Off Reserved
Off On Reserved
On On Reserved
Switches S1-6 and S1-7: System Clock Mode
Use Switches S1-6 and S1-7 to configure the 1092 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
Switch S1-8: Response to RDL Request
Use Switch S1-8 to allow Model 1092 to enter the Remote Digital
Loopback diagnostic test when requested to do so by the far end Model
1092 For example, when Switch S1-8 is set to “ON”, it will enter RDL
mode (See Section 5.3.2) when requested to do so by the remote
Model 1092.
S1-8
Setting
On Response to RDL Request Enabled
Off Response to RDL Request Disabled
7
3.1.2 Configuration Switch Set “S2”
Use the eight DIP Switches in Switch S2 to enable 19.2 kbps
synchronous operation, set the loopback modes and the speed of the
control port. The following table summarizes default positions of DIP
Switch S2. Detailed descriptions of each switch follow the table.
Switches S2-1: 19.2 kbps Synchronous Rate Enable
Use Switch S2-1 to allow the Model 1092 to operate at the 19.2
kbps
synchronous
data rate.
S2-1 Activation Description
Off Disabled Synchronous data rate is 32 - 128
kbps as defined by switches S1-1
and S1-2
On Enabled Model 1092 operates at
synchronous 19.2 kbps data rate*
*NOTE: To operate at 19.2 kbps, Set Switches S1-1 and S1-2 to
the OFF position (see page 6, Switches S1-1 and S1-2).
Switch S2-2: Not Assigned
8
S2 SUMMARY TABLE
Position Function Factory Default
S2-1 19.2 kbps Enable Off
S2-2 Not Assigned Off
S2-3 Response to LAL from DTE Off Disabled
S2-4 Not Assigned Off
S2-5 Not Assigned Off
S2-6 Response to RDL from DTE On Enabled
S2-7 Control Port Data Rate On
S2-8 Control Port Data Rate On
}
9600 bpsc
Important:
A pair of Model 1092s communicate synchronously
across the twisted pair line connection. Therefore, you must set
these switches whether your application is async or sync.
For X.21 or Async applications, please configure one Model 1092
for internal clock mode and the other Model 1092 for receive
recover clock mode.