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H323 Telephone Installation
Page 35
Issue 23e (Friday, February 15, 2019)
IP Office™ Platform 11.0
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Installation: System H.323 Support
2.3 DHCP Settings
The recommendation for H.323 phone installation is to use DHCP, especially if a large number of phones are being
installed. Using DHCP simplifies both the installation and maintenance.
There are a number of options around which server is used for the DHCP support for the H.323 phones:
·
If the IP Office system is to be used as a DHCP server for the network, use the processes below to check and
configure the system's DHCP settings.
·
If a separate DHCP server is used by the customer's network, that DHCP server may need to be configured to
support DHCP requests from IP phones, see
.
·
The IP Office can be configured to only provide DHCP support for Avaya phones. That option can be used to allow it
to be used in conjunction with a separate customer DHCP server. This removes the need to configure the
customer's DHCP server for IP phone support.
·
!
WARNING
Enabling an additional DHCP server in a network can cause connection issues for all devices on the network. Ensure
that you, the user, and the user's network administrator all agree upon the correct choice of DHCP server option.
Enabling IP Office DHCP Support
The following are the main steps for enabling the IP Office system to support DHCP operation for IP phones.
1.
Enable DHCP and Set the Number of Addresses
2.
Check the Site Specific Option Numbers
The IP Office defaults match the defaults used by Avaya IP phones. However it is important to check these values
and to be aware of their potential usage.
3.
If the IP Office system is set to provide DHCP for IP phones, that role includes telling the phones the location of
the file server they should use for phone firmware, even if that file server is not the IP Office system.
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