Cabletron Systems SPECTRUM 1800 User Manual page 38

Using the FRX4000, FRX6000, and SmartSwitch 1800 Hub View
Each cable pin is represented by a colored rectangle labeled with the pin name;
the color-coding tells you whether the pin is active (green; has voltage), inactive
(red; has no voltage), unused (tan, or no color), or its electrical status is unknown
(yellow). Each serial port provides information about the following pins:
TD (transmit data)
RD (receive data)
RTS (request to send)
CTS (clear to send)
DSR (data set ready)
CD (carrier detect)
TC (transmit clocking) When active, indicates that clocking is occurring on the
RC (receive clocking)
DTR (data terminal
ready)
TTA (transmit timing)
2-22
Figure 2-10. The Pin Status Window
Pin will be active when the connection is operational.
Pin will be active when the connection is operational.
For some protocols, the pin will become active when the
device wishes to send some data, and become inactive
once the data is sent; for a point-to-point protocol,
however, the pin will always be active.
The receiving device has responded to a request to send.
When active, indicates that the remote data
communications equipment (DCE) has signalled that is it
ready.
When active, indicates that the connected line is
operational (that is, a dial tone or similar indication is
present).
link.
When active, indicates that clocking is occurring on the
link.
When active, indicates that the data terminal equipment
(DTE) is ready.
When active, indicates that timing frames are being
transmitted.
Monitoring Hub Performance