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SW2-3: Extended Signaling Rate
The setting for switch SW2-3 determines the range of variability the
Model 1040 “looks for” in asynchronous data rates (i.e., the actual
variance from a given frequency level the Model 1040 will tolerate).
SW2-3 Setting
Off -2.5% to +1%
On -2.5% to +2.3%
SW2-4 and SW2-5: RTS/CTS Delay
The combined settings for switches SW2-4 and SW2-5 determine
the amount of delay between the time the Model 1040 “sees” RTS and
when it sends CTS. Options are no delay, 7mS and 53mS.
SW2-4 SW2-5 Setting
On On 7 mS
Off On 53 mS
On Off No delay
Off Off No delay
SW2-6 and SW2-7: 2-Wire/4-Wire Mode Selection
The setting for switch SW2-6 determines whether the Model 1040
is operating in 2-wire or 4-wire mode. Note: SW1-8 must be ON in
2-wire mode.
SW2-6 SW2-7 Setting
On On 4-wire (half duplex)
On Off 4-wire (full duplex)
Off On 2-wire (half duplex only)
SW2-8: V.52 and V.54 Diagnostic Tests
The setting for switch SW2-8 determines whether or not the Model
1040’s V.52 and V.54 tests will be enabled. To reset the V.54 circuit, set
switch SW2-8 to the “ON” position, then back to the “OFF” position.
SW2-8 Setting
On Disabled
Off Enabled
SW1-8: Carrier Control Method
The setting for switch SW1-8 determines whether the carrier is
“constantly on” or “controlled by RTS”. This setting allows for operation
in switched carrier, multipoint and/or hardware handshaking
applications. Note: SW1-8 must be “ON” in all 2-wire applications.
SW1-8 Setting
Off Constantly on
On Controlled by RTS
3.4 SWITCH SET SW2
The DIP switches on SW2 set word length, extended signaling
rate, RTS/CTS delay, 2-wire/4-wire and V.52/V.54 tests. The factory
default settings for Switch Set SW2 are summarized in the table below.
SW2-1 and SW2-2: Word Length
SW2-1 and SW2-2 are set in combination to determine the word
length for asynchronous/synchronous data.
SW2-1 SW2-2 Setting
Off On 8 bits
On On 9 bits
Off Off 10 bits
On Off 11 bits
7 8
SW2 SUMMARY TABLE
Position Function Factory Default
SW2-1 Word Length Off
SW2-2 Word Length Off
SW2-3 Extended Signaling Off -2.5% to +1%
SW2-4 RTS/CTS Delay On
SW2-5 RTS/CTS Delay On
SW2-6 2/4 Wire On
SW2-7 2/4 Wire Off
SW2-8 V.52/V.54 Tests Off Enabled
7 mS
10 bits
}
}
4-wire/full dpx
}