Option Description
12 Specifies the Hostname. By default, the Hostname is “T”+MAC Address; for
example, T001765FDBF1D. The Hostname can be manually provisioned
using the keypad.
53 Specifies the DHCP Message Type.
55 Specifies the messages to tell the server which options the IP Deskphone is
requesting. It appears in the Discover and Request. The SIP software
requests the following options
• 1 - IPv4 Subnet Mask
• 3 - Router
• 6 - Domain Name Server
• 15 - Domain Name
• 28 - Broadcast Address
• 43 - Vendor Specific Information
• 58 - Renewal Time
• 59 - Rebinding Time
• 66 - TFTP Server Name. The client treats this more generically as a request
for the provisioning server name and protocol.
• 99 - Must not be included
• 128, 131, 144, 157, 188, 191, 205, 219, 223 - Specifies old site specific
options. Recovered by IANA according to RFC 3942 and must not be used
for new installations.
• 224, 227, 230, 232, 235, 238, 241, 244, 247, 249, 251, 254- Specifies site
specific options.
57
Specifies maximum DHCP message size. The maximum message size is
1190 bytes.
60 Sends “Nortel-SIP-Phone-A” as the Vendor Identifier.
61 Specifies Client Identifier (MAC Address).
Server to IP Deskphone options
The DHCP server can send any option to the IP Deskphone as part of the DHCP Offer message.
The IP Deskphone accepts the following options:
DHCP Option
Description
IPv4 Address
Net mask 1
Table continues…
Configure the DHCP Server
104 SIP Software for Avaya 1200 Series IP Deskphones-Administration March 2015
Comments? infodev@avaya.com
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