Dhcp; Tftp; Http; Dns - Avaya 4600 Series Administrator's Manual

Overview of Voice over IP (VoIP) and Network Protocols

DHCP

Dynamic Host Configuration Protocol (DHCP) allows a server to assign IP Addresses and other
parameters to devices like the 4600 Series IP Telephones on an as-needed basis. DHCP
eliminates the need to configure each end station with a static IP Address. The DHCP
application also passes information to the 4600 Series IP Telephone. The DHCP application
identifies the PBX and the file server's IP Addresses. The application also identifies the paths to
the upgrade script and the application file on the file server.
For further information, see

TFTP

The Avaya 4600 IP Telephones can get useful application information from the TFTP server.
The telephones also can upgrade themselves using files stored on the TFTP server. After
downloading software, the Avaya 4600 Series IP Telephones can operate without a file server.
However, some functionality can be lost if the file server is not available for a telephone reset.
For further information, see
page 66.

HTTP

HTTP is potentially a more secure alternative to TFTP, particularly when Transport Layer
Security (TLS) is used to create HTTPS (Secure HTTP). You can store the same application
software, script file, and settings file on an HTTP server as you can on the TFTP server. With
proper administration, the telephone seeks out and uses that material appropriately. However,
the 4600 Series IP Telephone must already be running Release 2.2 software to be able to
access and use HTTP servers. As with TFTP, some functionality might be lost by a reset if the
HTTP server is not available. For more information, see
and HTTP on page 70.

DNS

The Domain Name System (DNS) is a distributed Internet directory service. DNS is used mostly
to translate between domain names and IP Addresses. Release 1.5 and later Avaya IP
Telephones can use DNS to resolve names into IP Addresses. In DHCP, TFTP, and HTTP files,
DNS names can be used wherever IP Addresses were available as long as a valid DNS server
is identified first. See
26 4600 Series IP Telephone Release 2.3 LAN Administrator Guide
DHCP and File Servers
DHCP and File Servers
DNS Addressing on page 94.
on page 52 and DHCP
on page 52 and TFTP (H.323 Only)
DHCP and File Servers
on page 53.
on
on page 52