Specifications

Configuring Switches
6 – 28 ShoreTel, Inc.
Monitor and Telco LEDs
The Monitor and Telco LEDs indicate line coding, network framing, and loopback
status. These LEDs are color coded—green, yellow, and red. The Monitor and Telco
LED descriptions follow.
NOTE Telco and Monitor LED alarms and errors are logged as switch events in
ShoreWare Director’s event log.
100M
• When green, the switch is connected to a 100BaseT network.
• When off, the switch is connected to a 10BaseT network.
• When red, this LAN connection is in standby mode.
Line
Coding
This LED indicates line coding status, as follows:
• When green, the line coding signal is good.
• When yellow, bipolar violations (BPV) are being received at one
second intervals.
• When red, a loss of signal (LOS) has occurred.
• When flashing red, loopback is active (local or CO).
• When off, the switch has no power.
Framing This LED indicates network framing status, as follows:
• When green, the T1/E1 signal is in frame; the signal is synchronized.
• When yellow, a yellow alarm has been received from the Central
Office.
• When flashing yellow, the frame-bit error rate has exceeded its limits.
• When flashing slow yellow, a small number of frame-bit errors
(10e
-6
) have occurred; this state will take up to 10 minutes to clear.
• When flashing fast yellow, a series of frame-bit errors (10e
-3
) have
occurred.
• When red, the T1/E1 signal is out-of-frame (OOF). The received
signal cannot be framed to the Extended Superframe (ESF) or D4
format.
• When flashing red, loopback is active (local or CO).
• When off, the switch has no power.