User's Manual

If an IP Deskphone fails to obtain an IP address from the DHCP process, SIP 4.3 enables the
IP Deskphone to use the phone's previously-used IP address, as long as there is not an IP
address conflict.
The following configuration parameter is introduced:
CACHED_IP_ENABLED [YES|NO]. The default value is NO.
If DHCP=YES on the IP Deskphone, then the cached IP parameter can also be modified
through the IP Deskphone's UI in the Network > Diagnostics menu.
DHCP untag:
SIP 4.3 introduces the configuration parameter DHCP_UNTAG_ENABLED [YES|NO]. The
default value is NO.
When this parameter is enabled, DHCP Untag functionality operates in the following manner:
the IP Deskphone attempts to obtain an IP address in a VLAN (DHCP discovery frames are
tagged). If the DHCP server is unreachable, then after the pre-defined number of Discovery
attempts the IP Deskphone begins sending Discovery frames in non-VLAN mode. If the IP
Deskphone still does not receive an Offer, then after a pre-defined number of Discovery
attempts, the IP Deskphone reverts to VLAN tag mode again.
IP address conflict check:
SIP 4.3 provides the ability for the IP Deskphone to check for an IP address conflict after
obtaining a DHCP lease. Once the IP address is obtained from the DHCP server, the IP
Deskphone sends an ARP request to verify that the new address is unique on the network.
Server profiles (IP Office 8.0, ABG 5800 6.2)
A System Configuration file allows the administrator to specify a list of domains to which the
IP Deskphone can connect. The administrator can specify up to five different SIP domains.
Each SIP domain supports 2 SIP servers: the Primary (S1) and the Secondary (S2). The
System Configuration file contains the SIP server-specific configuration parameters that are
applied to any SIP server specified in the list of SIP domains.
SIP 4.3 introduces the ability to support two different sets of configuration parameters: one
specific to the Primary SIP server and the other specific to the Secondary SIP server.
To support this option, the following configuration parameters are introduced:
• PRIMARY_SERVER_PROFILE <filename>
• SECONDARY_SERVER_PROFILE <filename>
For more information, see
Server Profiles on page 214
Features
SIP Software for Avaya 1100 Series IP Deskphones-Administration November 2012 11