Installing Modems
Figure 2-6 LightStream 2020 Power-up Sequence
Turn on
LS2020 power
Green LED on power
supply lights up
Blowers start running
TCS powers up; LEDs on
each card light up
Switch cards arbitrate
~5 seconds
to select master
TCS slaves enable power on cards; VCC LEDs light up to indicate local power on each card
POST executes;
yellow FLT LED lights up; green RDY LEDs blink on each card while POST runs
Yellow FLT LED goes out; green RDY LED lights up
Switch card master
runs shell;
NP boots itself
Yes POST No passes ?
Yellow FLT LED lights up; green RDY LED goes out
H3692
Installing Modems
You should install a modem for each switch card in the LS2020 chassis. In the event that an operational problem causes a node to be isolated from the rest of the network, the modem may be the only means available for communicating with that node.
The modem connects to the modem port on the modem/console assembly bulkhead at the back of the LS2020 chassis, using the modem cable described in the LightStream 2020 Site Planning and Cabling Guide.
Hardware Installation