Patton electronics 1205 User Manual page 7

JP3
1 2
Port B
Port A
1 2
Figure 4. Detailed View of Model 1205 Jumpers Showing Factory Default Settings
JP1: RTS/CTS Delay
The setting for jumper JP1 determines the amount of delay
between the time the Model 1205 "sees" RTS and when it sends CTS.
In order to emulate either dial-up or leased line modems, you can set
this strap at either 0 msec, 7 msec or 53 msec. Note: Port A and Port
B must be configured separately. Jumper functions are identical.
JP1
Position 1&2
Position 2&3
Strap Removed
JP2: Carrier Control
The setting for jumper JP2 determines whether the Model 1205's
carrier is "constantly on" or "controlled by RTS". Note: Port A and Port
B must be configured separately. Jumper functions are identical.
JP2
Position 1&2
Position 2&3
Strap Removed
JP3: Clock Source
The setting for jumper JP3 determines whether clocking is internal,
external or received loopback. Note
external clock. Note
must be set for external clock. Port B may not be set for external clock.
JP3 (Port A)
Position 1 and 2
Position 2 and 3
Strap Removed
JP3 (Port B)
Position 1 and 2
Position 2 and 3
JP1
3
1 2
Port B
Port A
3
1
Setting
7 msec Delay (factory default)
53 msec Delay
0 msec Delay
Setting
Carrier "Controlled by RTS"
Carrier "Constantly ON" (factory default)
Not a Valid Setting
2 : If Port B is set for receive loopback clock, Port A
Setting
Internal Clock (factory default)
External Clock
Not a Valid Setting
Setting
Internal Clock (factory default)
Received Loopback Clock
3 1
Port B
Port A
2 3
1
1 : Only port A may be set for
6
JP2
2 3
2 3