User's Manual

Network features 427
Table 101
IP Phone network configuration parameters
Parameters requested by IP Phone
(Option Code 55)
DHCP server
response: Option
Code
Subnet mask — the client IP subnet mask
1
Router/gateway(s) — the client default gateway IP
address (not required in DHCPOFFER in IP Phone
Firmware 1.25 and later for compatibility with Novell
DHCP server)
3
DNS Server IP
6
DNS domain
15
Lease time — implementation varies according to
DHCP server
51
Renewal time — implementation varies according to
DHCP server
58
Rebinding interval — implementation varies according
to DHCP server
59
TFTP Server Name
66
IP Line site-specific or vendor-specific encapsulated or
site options.
43, "128" (page 427)
, 131, 144, 157, 188,
191, 205, 219, "223"
(page 427) , 224, 227,
230, 232, 235, 238,
241, 244, 247, 249,
251, and 254
RFC 3942 states that DHCP site-specific options 128 to 223 are hereby
reclassified as publicly defined options. The IP Phone supports 9 vender
specific options in this range and continues to do so for backward compatibility.
However, as suggested in RFC 3942, the use of these options is discouraged to
avoid potential future collisions.
The first eight parameters in Table 101 "IP Phone network configuration
parameters" (page 427) are standard DHCP options and have pre-defined
option codes. The last parameter is for Call Server or TPS information,
which do not have a standard DHCP option. The server administrator must
define a vendor-encapsulated or site-specific option or both to transport
this information to the IP Phone.
This non-standard information includes the unique string identifying the IP
Phone and the Connect Server parameters for the primary and secondary
servers. The IP Phone must receive the Connect Server parameters to
connect to the IP Telephony node.
Nortel Communication Server 1000
IP Phones Fundamentals
NN43001-368 05.06 30 April 2010
Copyright © 2003-2010 Nortel Networks. All Rights Reserved.
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