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Cisco Integrated Services Router Hardware Installation Guide
OL-27407-01
Chapter1 Product Overview Cisco 810 Series
Memory
The Cisco 819HG and Cisco 819G ISRs uses non-upgradable flash memory and main memory. The
onboard flash memory contains the Cisco IOS software image and the boot flash contains the ROMMON
boot code. Table 1 -11 lists the memory requirements for Cisco 819 ISRs.
RSSI Green (solid) Signal > –60 dBm
Very strong signal
Green (three blinks and
then a long pause) Signal <= –60 to 74 dBm
Strong signal
Green (two blinks and
then a long pause) Signal <= –75 to –89 dBm
Fair signal
Green (one blink and
then a long pause) Signal <= –90 to –109 dBm
Marginal signal
Off Signal <= –110 dBm
Unusable signal
SIM Green / Yellow (one
green blink followed by
two yellow blinks)
SIM in slot 0 is active, SIM in slot 1 is not.
Yellow / Green (one
yellow blink followed
by two green blinks)
SIM in slot 1 is active, SIM in slot 0 is not.
Off / Green (two green
blinks and then a pause) No SIM in slot 0, SIM present in slot 1.
Green / Off (Slow single
green blink and then a
pause)
SIM present in slot 0, no SIM in slot 1.
Off / Off No SIM present in either slots.
3G/4G Green (one blink and
then a pause) For 1xRTT, EGPRS, or GPRS service.
Green (two blinks and
then a pause) For EVDO, EVDO/1xRTT, or UMTS service.
Green (three blinks and
then a pause) For EVDO/1xRTT RevA, HSPA, or HSUPA/HSDPA
service.
Green (four blinks and
then a pause) For HSPA+ service.
Green (Solid) For 4G/LTE service.
Off No Service.
Table1-10 4G LTE LED Descriptions (continued)
LED Color Description