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Chapter 1 Introduction Installation and Operation Manual
1-22 Functional Description FCD-E1
Control Line Connector
CONTROL
DCE
CONTROL
DTE
CTS Out In
DCD Out In
DSR In In
DTR Out Out
RI Not used In
RTS In Out
AUTOBAUD Function
When the AUTOBAUD function is enabled, the FCD-E1 can identify the data rate
of the signal received at the CONTROL DCE port by analyzing the timing of three
consecutive Carriage Return + Line Feed characters (generated by pressing three
times the <Enter> key). The detected data rate is then used for the current
communication session.
The data rate used by the CONTROL port is always equal to the data rate
configured by the user, and therefore it need not be equal to the data rate used at
the CONTROL DCE port.
The automatic baud rate identification procedure is performed (or repeated)
whenever three consecutive carriage returns are received after one of the following
events occurs:
• The DTR line has been switched OFF.
• The EXIT command has been executed.
• The idle disconnect time-out expired because no data has been exchanged
with the supervision terminal.
In case one of these events occurred, FCD-E1 assumes that the current
communication session has been terminated. Therefore, when the password
protection is enabled, the password must be entered again before the supervision
communication with the FCD-E1 can be resumed.
The AUTOBAUD function is supported only by the CONTROL DCE port, and
must not be used when SLIP or PPP communication is desired.
SNMP and Telnet Management Access Options
The control subsystem of FCD-E1 systems supports both out-of-band and inband
management access.
• For out-of-band management, the connection is made through one of the
FCD-E1 serial or Ethernet ports. For serial ports, the user can select either the
SLIP (Serial Link IP) or the PPP (Point-to-Point) protocol; Ethernet ports support
the IP and ARP protocols. Both serial and Ethernet ports support the RIP2
routing protocol.
• Inband management is available for the main link and sublink. See Appendix B
for details.
Note