Cisco Systems manual LightStream 1010 ATM Switch PAM Installation Guide

Connecting the Interface Cables and Checking the LEDs

Table 8-2		LED Illumination States of CES T1 or CES E1 PAMs
Port LEDs		Illumination States
S1	(status1)	Steady green, red, or yellow; flashing green, red, or yellow; or off.
S2	(status2	Steady green, red, or yellow; flashing green, red, or yellow; or off.
CD (carrier detect)		Either on (green) or off.

Table 8-3 shows the possible status conditions of a CES T1or CES E1 port, as indicated by certain settings of associated port LEDs.

Table 8-3	Port Status Conditions Indicated by CES T1 or CES E1 LEDs
Port Status Indication		S1 LED State	S2 LED State	CD LED State
Port not configured		Off	Off	Off
Port administratively down		Off	Off	Off
Normal		Green	Green	Green
Red alarm due to framing error		Red	Red	Off
Red alarm due to loss of cells		Red	Red	Green
Yellow alarm		Yellow	Off	Green
Blue alarm		Off	Yellow	Green
Port in loop state		Flashing green	Flashing green	Green

Note During alarm integration, the indicated LEDs will flash the “upcoming” or “next” state combination indicated in Table 8-3. For example, when the line conditioning state machine is notified of loss of signal (LOS), it will cause S1 and S2 to flash red, since a continued LOS will put the port in the red alarm state.

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