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84 4600 Series IP Telephone Release 2.2 LAN Administrator Guide
DNS Addressing
As of Release 1.5, the 4600 IP Telephones support DNS addresses and dotted decimal
addresses. The telephone attempts to resolve a non-ASCII-encoded dotted decimal IP Address
by checking the contents of DHCP Option 6. See DHCP Generic Setup
on page 50 for
information. At least one address in Option 6 must be a valid, non-zero, dotted decimal address,
otherwise, DNS fails. The system parameter DOMAIN’s (Option 15, Table 6
) text string is
appended to the address(es) in Option 6 before the telephone attempts to resolve the DNS
address. If Option 6 contains a list of DNS addresses, those addresses are queried in the order
given if no response is received from previous addresses on the list. As an alternative to
administering DNS by DHCP, you can specify the DNS server and/or Domain name in the TFTP
or HTTP script file. But first SET the DNSSRVR and DOMAIN values so you can use those
names later in the script.
Note:
Note: If you administer Options 6 and 15 appropriately with DNS servers and Domain
names respectively, you do not need to specify MCIPADD and TFTPSRVR
settings in the Site Specific Option string.
Customizing the Site-Specific Option Number (SSON)
DHCP Generic Setup on page 50, discusses that the SSON can be set to a string. For each
system parameter listed in Table 6
that you want to include, append the SSON string with:
a comma followed by name=value
where name is a parameter name and value is its associated value. Invalid values cause the
data to be ignored for that name. Customizing the SSON affects all telephones associated with
that DHCP server.
Entering Options Using the Telephone Dialpad
The 4600 Series IP Telephone Installation Guide’s Chapter 3 details how to use the local
administrative options.
To customize any or all of the QoS parameters locally, follow the “QoS Option Setting”
procedure. You can find that procedure in Chapter 3 of the 4600 Series IP Telephone
Installation Guide.
To enable or disable the secondary Ethernet hub locally, follow the “Secondary Ethernet (Hub)
Interface Enable/Disable” procedure. That procedure also appears in Chapter 3 of the 4600
Series IP Telephone Installation Guide.
To view the 4600 IP Telephone system parameters, see The View Administration Option
on
page 111.