Specifications

Configuring and Maintaining 400-Series IP Phones Specifying Configuration Parameters on a Phone
5
ShoreTel 14 Maintenance Guide 132
Internet protocol Use DHCP If On, DHCP is used to collect the IP address layer information. If Off,
you must manually enter the IP address layer information.
If On, DHCP provides values for the following fields. If Off, specify static
values for these fields:
 IPv4 address
 Subnet mask
 Gateway
 DNS
 SNTP (Simple Network Time Protocol) server
It is optional but recommended that DHCP option tag 156 be used to
specify the designated configuration server for ShoreTel 400-Series IP
phones. For more information about this DHCP option tag, see
Specifying Configuration Parameters through DHCP Site-Specific
Options on page 134.
DHCP lease If Active, indicates a DHCP lease has been received by the phone.
Cache DHCP If On, the last received DHCP lease is cached and used if a DHCP
lease is not received on the next renew. If Off and static values are not
provided, the phone will fail to get an IP address if the DHCP server
does not respond.
IPv4 address The IP address of the phone. If Use DHCP is On, this field displays the
value from the DHCP server.
Subnet mask If Use DHCP is Off, specify the static subnet mask for the phone. If Use
DHCP is On, this field displays the value from the DHCP server.
Gateway If Use DHCP is Off, specify up to three static IP gateways. (If you do
not want to specify a gateway, set the value of the Subnet mask field to
0.0.0.0 to confirm that no address needs a gateway.) If Use DHCP is
On, this field displays the value from the DHCP server.
DNS The default list of static DNS servers. DHCP can override these
servers. If Use DHCP is on, this field displays the current value.
SNTP server The IP address for the SNTP server, which is required for phone
operation. The SNTP server should be synchronized with the time used
by the ShoreTel Headquarters server. DHCP option tag 42 should be
used to pass the time server IP address.
If Use DHCP is On, this field displays the value from the DHCP server.
DSCP audio The Differentiated Services Code Point (DSCP) value to be used for
audio packets. (For details on DSCP, see RFC 2475.)
The default value is 46.
DSCP SIP The Differentiated Services Code Point (DSCP) value to be used for
signaling (SIP) packets. (For details on DSCP, see RFC 2475.)
The default value is 26.
Table 20: Phone Information for ShoreTel 400-Series IP Phones (Continued)
Admin Options
Menu Item
Option Name Description