Configuration Option Tables
Table A-3. Data Port Options (2 of 3)
Carrier Control by RTS
Possible Settings: Constant, Switched
Default Setting: Constant
Simulates Constant or Switched Carrier operation.
Constant ± The internal RTS is forced on and the DSU is in a constant Data Mode on the transmit line. The external RTS lead is ignored. The actual signal on the line is either all ones (DMI) or DTE transmitted data.
Switched ± RTS is monitored and CMI codes are transmitted when RTS is off.
CTS Control
Possible Settings: Standard, Follow RTS, Forced On, Circuit Assurance
Default Setting: Standard
Specifies the operation of the Interchange Circuit CT106, Clear to Send (CTS), which is an output from the DSU.
Standard ± CTS follows the internal RTS with a fixed delay, except that CTS will be off when a network interface related alarm is detected or a test is active. The active test may be initiated locally, remotely, or by the network.
Follow RTS ± CTS follows the external RTS lead without delay, regardless of alarms and tests.
Forced On ± CTS is always forced on after the unit is powered up with a successful
Circuit Assurance ± With circuit assurance, CTS operates the same as the Standard option, except that CTS will also be deasserted when CMI codes are being received.
RLSD Control
Possible Settings: Standard, Forced On
Default Setting: Standard
Specifies the operation of the Interchange Circuit CT109, Received Line Signal Detector (RLSD or CD), which is an output from the DSU.
Standard ± RLSD is asserted when Data Mode is on the receive line. RLSD deasserts when a DDS facility alarm is detected or the DSU is receiving CMI codes.
Forced On ± RLSD is forced on after the unit is powered up with a successful
DSR Control
Possible Settings: Standard, Forced On, On During Test
Default Setting: Standard
Specifies the operation of the Interchange Circuit CT107, Data Set Ready (DSR), which is an output from the DSU.
Standard ± DSR is always asserted, except when a DDS facility alarm is reported or the DSU is in Test mode.
Forced On ± DSR is forced on after the unit is powered up with a successful
On During Test ± DSU operates the same as the Standard option, except that DSR remains asserted when the DSU is in Test mode to allow the DTE to send test patterns.
November 1997 |
