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Cabling the Switch
2-13
Figure 2-5. Single V.35 LEDs
Table 2-6. Single V.35 LED Indicators
Figure 2-6 shows the T1 CSU/DSU LEDs. Look at the condition of the LEDs,
then examine the corresponding LED table to better understand the indications.
LED Description
LED1 Power is on to the adapter and the onboard
microcode is loaded.
LED2 The signals CDC and DSR are on between the
DSU and the adapter. LED2 detects receive
link status.
LED3 Cable is detected.
LED4 No external transmit clock source is available.
LED 4, Red
LED 3, Green
LED 1, Yellow
LED 2, Blue