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3.3 CONFIGURATION SWITCH SET S2
The DIP switches on S2 set word length, extended signaling rate, RTS/
CTS delay, V.52 & V.54 diagnostic tests and 2- and 4-wire operation.
The default settings are summarized in Table 6.
S2-2: 2-Wire/4-Wire Mode Selection
The setting for switch S2-2 determines whether the Model 1080ARC is
operating in 2-wire or 4-wire mode (see Table 7).
S2-3: V.52 and V.54 Diagnostic Test
To reset the V.54 circuit, set switch S2-3 to the “ON” position, then back
to the “OFF” position (see Table 8).
Table 6:
Summary of DIP switch default settings for S2
Position Function Factory Default
S2-1 Not Used N/A
S2-2 2-Wire/4-Wire Off (4-Wire)
S2-3 V.52/V.54 Tests Off (Normal Operation)
S2-4 RTS/CTS Delay On (7 ms)
S2-5 RTS/CTS Delay On (7 ms)
S2-6 Extended Signaling Rate Off (-2.5% to 1%)
S2-7 Word Length Off (10 bits)
S2-8 Word Length Off (10 bits)
Table 7:
2-Wire/4-Wire Mode Selection Settings
S2-2 Setting
Off 4-wire (full or half duplex)
On 2-wire (half duplex only)
Table 8:
V.52 and V.54 Diagnostic Test Settings
S2-3 Setting
Off Normal Operation
On Test Disabled