Installation guide

272 Planning and Installation Guide ShoreTel 14.2
IP Phone Installation DHCP Settings
14
DHCP Settings
ShoreTel IP phones are pre-configured to use the network’s DHCP server for addressing. In addition to
its address and standard network addresses, the DHCP server’s response also provides the following
addresses for phone configuration:
 ShoreTel server address
The ShoreTel server provides the IP phones with the latest application software and the
configuration information that enables IP phones to be automatically added to the ShoreTel
system. The ShoreTel server’s address must be provided to the phone as a vendor-specific option.
ShoreTel IP phones are pre-configured to look for the ShoreTel server’s address to be specified as
Vendor Specific DHCP Option 156. If this option is not available, the ShoreTel IP phones use
Option 66. For information about configuring these DHCP options, see Configuring DHCP for
ShoreTel IP Phones on page 55.
 SNTP server address
The DHCP server should be configured to provide the address of your network’s SNTP server to
provide date and time information to the IP phones.
Installing ShoreTel IP Phones
Installing ShoreTel IP phones involves plugging the phones into the network. The ShoreTel system
automatically adds the phones to the network. For instructions on manually configuring phones, see
Manually Configuring ShoreTel IP Phones on page 273.
Updating Firmware for IP Phones
After you install new IP phones, you should update the phone firmware.
ShoreTel 400-Series IP Phones
After ShoreTel 400-Series IP phones are added to the ShoreTel system, rebooting the phones updates
configuration information but does not update the phone’s firmware. To update phone firmware, use
the Diagnostics & Monitoring system available through ShoreTel Director. For details on upgrading
phone firmware, see the ShoreTel Maintenance Guide.
Note
If you previously used phones in an environment where automatic provisioning through DHCP was not
used or the phones are from a vendor other than ShoreTel, the phones might not boot properly
because incorrect configuration information is present in the phone. For information about clearing a
phone’s configuration, see Clearing a Phone’s Configuration Settings on page 279.