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CHAPTER 3: Configuration
Table 3-2. DIP-switch summary
Position
Function
Factory Default
S1-1
Gapped Clock
On
No Gapped
S1-2
Gapped Clock
Off
Clock
S1-3
Sync Method
Off
Bypass
S1-4
Sync Method
On
Sync Circuit
Switches S1-1 and S1-2: Gapped Clock
Switches S1-1 and S1-2 allow the IC945A to generate a HSSI gapped clock.
Gapped clocking is a method of flow control in which data flow is interrupted
by an idle (gapped) clock signal. In this mode, the IC945A will gap the ST
clock to the HSSI DTE whenever the V.35 CTS signal is de-asserted. In the
“No Gapped Clock” setting, the V.35 clock passes through with only a level
change.
S1-1
S1-2
Description
Off
Off
Not a Valid Setting
Off
On
Gapped Clock
On
Off
No Gapped Clock
On
On
Not a Valid Setting