Modular Fast Ethernet Bridge Management System Technical Description and Configuration Guide
V. 3.12. 1.0
·
© SAF Tehnika A/S 2003
9
3.1.2
V.35 Interface Module LEDs
There are four LEDs on V.35 module. LEDs have a multifunctional meaning, basic
meanings are:
•
C (DCD) - data carrier detected
•
D (Data, both TxD and RxD)
•
S (Send, both RTS - Request to Send, CTS - Clear to Send)
•
R (Ready, both DSR - Data Set Ready, DTR - Data Terminal Ready)
General color meaning:
Green – normal operation; Yellow – information for service modes;
Red – fault indication; Not lit – no signal; Flickering – additional information.
Table 4. V.35 interface module LEDs
LED
Description
Green
– carrier is detected;
Red
– carrier is NOT detected, (problem with radio)
C (DCD)
The following will be available through management facilities:
Flickering yellow and green(7:1)
– loopback is set and carrier is
detected;
Flickering yellow and red(7:1)
– loopback is set and carrier is NOT
detected;
Flickering yellow (7:1)
– loopback is set and cable is damaged;
Flickering green (7:1)
– cable is damaged and loopback is NOT set;
D (RxD,
TxD)
Green
– both received and transmitted data signals are OK,
Off
– none is present,
Green is blinking and goes off
– just one data signal is present
(TxD:RxD = 7:1),
Yellow
– remote loopback is set;
S (RTS,
CTS)
Green
– both signals are active,
Off
– both signals are inactive,
Flickering green
– one control signal is present, another is absent
(RTS:CTS = 7:1),
Blinks yellow and red
– module has set the CTS signal but the
returned signal is dissimilar to that set by the module, - indicates cable
fault;
R (DSR,
DTR)
Green
– both signals are active,
Off
– both signals are inactive,
Flickering green
– one control signal is present, another is absent
(DSR:DTR = 7:1),
Blinks yellow and red
– module has set the DSR signal but the
returned signal is dissimilar to that set by the module, - indicates cable
fault.