Installation guide

IPBX-T1 and IPBX-E1 Voice Switch ShoreTel Voice Switches
F
ShoreTel 14.2 Planning and Installation Guide 491
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4 flashes — The IP address is unavailable. DHCP and BOOTP did not respond to the IP
address request, and the IP address is not available in nonvolatile memory to continue boot
process. The switch will automatically reboot in five seconds and try again. Check the BOOTP/
DHCP server and the network configuration to ensure that the voice switch is receiving a valid
IP address.
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5 flashes — The operating system is not available. The switch is booting from FTP but cannot
find the boot files. It automatically reboots in five seconds.
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6 flashes — Using a previously stored IP address. A BOOTP/DHCP transaction was
attempted, but the BOOTP/DHCP server did not respond. The switch continues to use the IP
address stored in nonvolatile memory until it receives a valid response. If the switch receives a
response that provides a different IP address, it reboots using the new IP address. If the
switch receives a response that matches the IP address stored in nonvolatile memory, it
continues operation, and the power LED stops flashing. If the problem persists, check the
BOOTP/DHCP server and network configuration.
Network LEDs
Network LEDs indicate the speed at which the switch is communicating with the network and when
there is network activity. The network LED descriptions follow:
 Link: This LED indicates that the switch is connected to an Ethernet network.
 100M
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When lit, the switch is connected to a 100BaseT network.
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When off, the switch is connected to a 10BaseT network.
 Traffic: This LED indicates network activity, as follows:
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When flashing, network activity is detected.
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When on (not flashing), heavy network activity is detected.
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When off, network activity is not detected.
This LED is not directly related to any particular switch’s individual network activity. For example, if you
have three switches connected to the same hub, and one switch’s Traffic LED shows activity, the other
switches will indicate the same.
T1 and E1 LEDs
The T1 and E1 LEDs indicate line coding, network framing, and loopback status. These LEDs are color
coded—green, yellow, and red. T1 and E1 LED alarms and errors are logged as switch events in
ShoreTel Director’s event log.
 Line Coding: This LED indicates line coding status, as follows:
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When green, the line coding signal is good.
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When yellow, bipolar violations (BPV) are detected one second intervals.
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When red, a loss of signal (LOS) has occurred.