Avaya SIP Software 3.2 for 1200 Series Uživatelský manuál Strana 85

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IP Deskphone to Server options
When a DHCP client sends a DHCP Discover and Request message, it includes a list of options
as part of the request. The IP Deskphone DHCP client sends the following options:
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 “Avaya-SIP-Phone-A” as the Vendor Identifier.
61 Specifies Client Identifier (MAC Address).
IP Deskphone to Server options
SIP Software for Avaya 1200 Series IP Deskphones-Administration January 2012 85
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