Configuring The Hardware Dip Switches - Patton electronics 1193 User Manual

3 3 . . 0 0 C C O O N N F F I I G G U U R R A A T T I I O O N N
The Model 1193 is equipped with eight DIP switches, which allow
configuration of the unit for a wide variety of applications. This section
describes location of the switches and explains all possible configura-
tions.

3.1 CONFIGURING THE HARDWARE DIP SWITCHES

The 8 external dip switches are accessible from the underside of
the Model 1193 (See Figure 2 below).
Rear
S1
Figure 2. Underside of Model 1193, showing location of the DIP switches
Figure 3 shows the orientation of the DIP switches in the
"ON" and "OFF" positions.
ON
Figure 3. Close up of configuration switches
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Front
On
Off
OFF
3.1.1 Configure the Model 1193
Switches S1 through S8 may be used to configure clocking modes
and line coding. Default settings of the switches are shown in the table
below. A description of the switch options follows the table.
Position Function
Clock Source
S1
S2 Clock Source
S3 Line
S4 Coding
S5
S6 Reserved for Future Applications
S7
S8
Switches S1 and S2: Clock Mode
Use switches S1 and S2 to determine clock mode of the 1193.
S1 S2 Setting Description
On On Internal Transmit clock generated internally
On Off Receive Recover Transmit clock derived from the line
Off On Network Transmit clock derived from G.703/G.704
equipment interface
Off Off Internal use only
Switch S3 and S4: Line Coding Options
Note: The Model 1193 units are intended to work in pairs. Set the clock
modes for the Model 1193 units with one end of the link set for receive
recover and the other end set for either internal or network.
Use switches S3 and S4 to determine whether the G.703/G.704 line
coding is HDB3 or AMI (for older telecommunications equipment). The
line coding must be the same line coding prescribed by the NAP
(Network Access Provider). Most applications will use HDB3.
High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter
deliberately inserts a bipolar violation when excessive zeros in the
data stream are detected. The receiver recognizes these special vio-
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Default Setting
ON
Internal
}
ON
Clock
OFF
}
HDB3
OFF
OFF