Patton electronic 2070 ユーザーズマニュアル
Switches S1-1: Test Mode Activation
Use Switch S1-1 to enable or disable the Model 2070/Ax Test
Mode. When enabled, the Local Line and G.703 loopback tests
activate simultaneously. When disabled, the Model 2070/Ax functions
normally.
activate simultaneously. When disabled, the Model 2070/Ax functions
normally.
S1-1
Activation
Description
On
Enabled
Local Loop and G.703 Loop
diagnostics enabled
diagnostics enabled
Off
Disabled
Local Loop and G.703 Loop
diagnostics disabled
diagnostics disabled
Switches S1-2 and S1-3: Clocking Mode
Use Switches S1-2 and S1-3 together to set the system clock for
the Model 2070/Ax. When using two Model 2070s together in a point-
to-point application as short range modems, set one unit for either
Internal or External transmit clock and the other unit to Network clock.
When connecting directly to the G.703 network, set the unit to Network
clock.
to-point application as short range modems, set one unit for either
Internal or External transmit clock and the other unit to Network clock.
When connecting directly to the G.703 network, set the unit to Network
clock.
S1-2
S1-3
Clocking
Description
On
On
Network
The G.703 network
provides the system clock
provides the system clock
On
Off
External
The DTE provides the
system clock
system clock
Off
On
Internal
The Model 2070/Ax
provides an internally
generated system clock
provides an internally
generated system clock
7
2070/Ax SWITCH S1 SUMMARY TABLE
Position
Function
Factory Default
S1-1
Test Mode
Off
Disabled
S1-2
Clock Mode
On
S1-3
Clock Mode
On
S1-4
Respond to LL Request
On
Disabled
}
Network
Clock
8
Switch S1-4: Response to DTE Request for Local Loopback
Use Switch S1-4 to enable the Model 2070/Ax to enter Local
Loopback mode when pin 18 from the V.24 interface is raised. In the
On position, the Local Loopback may only be enabled manually by
Switch S1-1.
On position, the Local Loopback may only be enabled manually by
Switch S1-1.
S1-4
Activation
Description
On
Disabled
Model 2070/Ax ignores DTE
requests to enter Local Loopback
requests to enter Local Loopback
Off
Enabled
Model 2070/Ax enters Local
Loopback Mode when pin 18 is
raised
Loopback Mode when pin 18 is
raised
3.2.2 Jumper Straps “JP1” and “JP2”
The Model 2070/Ax uses two jumper straps to select the power
source option and to connect the unit signal ground to frame ground.
Figure 5 (below) shows the position of Jumper Straps JP1 and JP2 on
the bottom side of the Model 2070/Ax PC board.
Figure 5 (below) shows the position of Jumper Straps JP1 and JP2 on
the bottom side of the Model 2070/Ax PC board.
Figure 6 shows possible settings of jumper straps JP1 and JP2.
JP1 may be positioned on pegs 1 and 2 or on pegs 1 and 3; JP2 may
be positioned on pegs 4 and 6 or on pegs 5 and 6.
be positioned on pegs 4 and 6 or on pegs 5 and 6.
ON
1
2
3
4
Figure 5. Location of Strap JP1 and JP2 on the bottom of the Model 2070/Ax PC board
Figure 6. Possible Settings of Jumper Straps JP1 and JP2
1
3
5
3
5
2
4
6
4
6
Jumpers JP1
& JP2
1
2
3
5
6
JP2
JP1
4