Command Reference Guide

3Com Router 5000 Family and Router 6000 Family detect ● 69
Command Reference
detect
Purpose Use the detect command to enable data carrier detection as well as level detection
on a serial interface.
Use the undo detect command to disable data carrier detection as well as level
detection on the serial interface.
Syntax 1. Asynchronous serial interface
detect dsr-dtr
undo detect dsr-dtr
2. Synchronous serial interface
detect { dcd | dsr-dtr }
undo detect { dcd | dsr-dtr }
Parameters dsr-dtr
Detects DSR and DTR signals of DSU/CSU.
dcd
Detects the DCD signal of the DSU/CSU on the serial
interface.
Default By default, the serial interface is enabled to make data carrier and level detection.
Example Disable the serial interface to make data carrier detection.
[3Com -Serial0/0/0] undo detect dcd
View This command can be used in the following views:
■ Synchronous Serial Interface view,
■ Asynchronous Serial Interface view
Description If this function is disabled on the serial interface, the system does not detect the DCD
and DSR/DTR signals when determining the state (UP or DOWN) of the interface.
When level detection is disabled on a serial interface, the system does not detect
whether a cable is connected if the interface is asynchronous, AUX or Async for
example and the state of the interface is up automatically. If the interface is
synchronous/asynchronous, however, it goes up only when the system detects that a
cable is connected.