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7511-A2-GN10-10
January 1999
Table 1. Configuration Options (4 of 5)
Switch Options and Usage
Default in Bold
CTS
S2-1 & S2-2 (DSU A)
S4-1 & S4-2 (DSU B)
S1 S2
S3 S4
DSU A
DSU B
ON ON
ON ON
Determines the operation of interchange circuit CT106, Clear to Send
(CTS).
Off Off Standard
CTS follows RTS with a fixed delay except when an alarm is detected
or a test is active, when CTS is turned off.
Off ON Circuit Assurance
Same as standard, but CTS is also turned off when Carrier Mode Idle
codes are received.
ON Off Follow RTS
CTS follows RTS without delay, regardless of alarms and tests.
ON ON Forced On
CTS is forced on after a successful self-test.
RTS
S2-3 (DSU A)
S4-3 (DSU B)
S1 S2
S3 S4
DSU A
DSU B
ON ON
ON ON
Determines the operation of interchange circuit CT105, Request to
Send (RTS).
Off Constant
The internal RTS is forced on and the DSU is in a constant data mode.
The transmitted signal is either Data Mode Idle codes or DTE data.
ON Switched
RTS is monitored, and Carrier Mode Idle codes are transmitted when
RTS is off.
LSD
S2-4 (DSU A)
S4-4 (DSU B)
S1 S2
S3 S4
DSU A
DSU B
ON ON
ON ON
Determines the operation of interchange circuit CT109, Line Signal
Detect (LSD).
Off Standard
LSD is on when the receive line is in data mode, and off when an alarm
is detected or Carrier Mode Idle codes are received.
ON Forced On
LSD is forced on after a successful self-test.