Considerations For Ip Hard Phones Supported By A Local Survivable Processor; Completing The Installation Process - Avaya G700 Installation And Upgrades

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3 Avaya S8300 Media Server: Considerations for IP Hard Phones Supported by a Local Survivable
Considerations for IP Hard Phones Supported by a
Local Survivable Processor
A DHCP server hands out IP addresses to IP endpoints dynamically. Avaya IP hard phones perform a
DHCP discover request to receive an IP address, as well as receive parameters necessary to function
correctly. These parameters include the location of the call control server, the location of the TFTP server,
as well as the directory on the TFTP server from where the phone receives its upgrades.
When preparing a DHCP server to work with Avaya IP hard phones, there is an option that must be
administered to allow the Avaya phone to receive the DHCP offer. This option is "site-specific-option-
number" (sson) 176. Different DHCP servers allow for this administration in different ways, but the sson
option must be mapped to 176. Then the option can be set up to send the information desired to the Avaya
phones for the intended activity.
The sson option should send a string. This string will include "MCIPADD=www.xxx.yyy.zzz". MCIPADD
defines the Avaya Call Controller with which the phone will register. In an S8700 system, this address
should be a CLAN address, and in an S8300 system, this address will be the IP address of the S8300.
Multiple addresses can be administered at this point to allow for LSP failover. The second address in the
MCIPADD list should be an LSP IP address, and any subsequent addresses should be alternate LSPs. Local
LSPs should appear first in the list, with remote LSPs later in the list as possible back ups.
Also included in the sson option string is the "MCPORT=1719". This is the port the phone will listen on for
signalling traffic to the call controller. Next is the tftp server field. This field indicates to the phone where it
is to receive firmware updates, along with the tftp directory field.
All phones for which the DHCP server has LSP A as the second address in the MCIPADD list should either
be administered to be part of the same network region, or the network regions involved should be
interconnected. On the primary controller in the ip-network-map form, a range of IP addresses can be
specified to be part of the specified network region. This is where the phones of a specific subnet or range
should be placed into the same network region. If it is not desired for all the phones receiving a controller
list with LSP A to be in the same network region, the form "ip-network-region #" should interconnect all the
network regions that contain those phones.

Completing the Installation Process

Consult the planning documentation to obtain the necessary information to complete the installation. Part of
the final process will be to:
• Complete the electrical installation
• Enable adjunct systems
Installation and Upgrades for G700
555-234-100 – Issue 1 – May 2002
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