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Administering Telephone Options
98 9600 Series SIP IP Telephones Administrator Guide SIP Release 2.0
DNS Addressing
The 9600 Series SIP 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 56 for information.
At least one address in Option 6 must be a valid, non-zero, dotted decimal address, otherwise,
DNS fails. The text string for the DOMAIN system parameter (Option 15, Table 11
) is appended
to the address(es) in Option 6 before the telephone attempts DNS address resolution. 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 HTTP script file. But
first SET the DNSSRVR and DOMAIN values so you can use those names later in the script.
Note:
Note: Administer Options 6 and 15 appropriately with DNS servers and Domain names
respectively.
IEEE 802.1X
Certain 9600 Series SIP IP Telephones support the IEEE 802.1X standard for pass-through and
Supplicant operation but only if the value of the configuration parameter DOT1XSTAT is “1” (the
default, meaning supplicant operation is enabled, and the telephone responds only to received
unicast EAPOL messages) or “2” (supplicant operation enabled, and telephone responds to
received unicast and multicast EAPOL messages). If DOT1XSTAT has any other value,
supplicant operation will not be supported. The system parameter DOT1X determines how the
telephones handle 802.1X multicast packets and proxy logoff, as follows:
● When DOT1X = 0 (the default), the telephone forwards 802.1X multicast packets from the
Authenticator to the PC attached to the telephone and forwards multicast packets from the
attached PC to the Authenticator (multicast pass-through). Proxy Logoff is not supported.
● When DOT1X = 1, the telephone supports the same multicast pass-through as when
DOT1X=0. Proxy Logoff is supported.
● When DOT1X = 2, the telephone forwards multicast packets from the Authenticator only to
the telephone, ignoring multicast packets from the attached PC (no multicast
pass-through). Proxy Logoff is not supported.
Regardless of the DOT1X setting, the telephone always properly directs unicast packets from
the Authenticator to the telephone or its attached PC, as dictated by the MAC address in the
packet.