Avaya IP Office 4.2, Руководство по установке

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H323 Install Page 12
15-601046 Issue 14j (10 March 2009) IP Office 4.2
1.5 Simple Installation
The diagram below shows the simplest installation scenario.
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For IP Office control units other than the IP500, and for IP500 units running IP Office 4.0/4.1 software, this type
of installation is only supported for up to 5 IP phones.
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For IP500 control units running IP Office 4.2+, this type of installation can be used for DHCP support of up to 272
IP phones (the maximum extension capacity of IP500 systems). The IP Office control unit can also act as the file
server to up to 50 phones.
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DHCP Server
The IP Office unit is acting as the DHCP server for the Avaya IP phones. Key settings such as the file server
address are entered into the IP Office configuration and then provided to the phones in addition to their IP
address.
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For IP Office 4.2+, the IP Office DHCP server can be configured to provide DHCP addresses only in response
to requests from Avaya IP phones. This allows an alternate DHCP server to be used for other devices that use
DHCP.
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H323 Gatekeeper
IP phones require an H323 gatekeeper to which they register. The gatekeeper then controls connecting calls to the
phone. In this scenario the IP Office control unit acts as the H323 Gatekeeper.
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File Server
During installation, and occasionally for maintenance, the IP phones need to download software and settings files.
They can download the files from an HTTP server or TFTP server. The phones will try HTTP first and then TFTP.
There are a number of options for the file server role:
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TFTP Server
For all IP Office releases, for phones being supported by IP Office DHCP, the address of the TFTP server is set
as part of the IP Office configuration. If otherwise the only way to specify the TFTP server is via a separate
DHCP server or via static installation settings.
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IP Office Control Unit
For IP Office control units fitted with an additional memory card (Small Office Edition, IP406 V2 and
IP500), the IP Office itself can be used as the TFTP server. This requires the IP phone firmware files to be
transferred onto the memory card.
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HTTP Server
or IP Office 4.2+, phones being supported via IP Office DHCP, the address of the HTTP server is set as part of
the IP Office configuration. If otherwise the only way to specify the HTTP server is via a separate DHCP server
or via static installation settings.
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For IP Office 4.2, using an Embedded Voicemail memory card is supported for HTTP file requests for up to
50 IP phones. This is done by setting the TFTP Server IP Address and HTTP Server IP Address to the
control unit IP address. This is supported for up to 50 IP phones.
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For IP Office 4.2 Q4 2008 maintenance, using the IP Office Manager application is supported for HTTP file
requests for up to 5 IP phones. This is done by setting the TFTP Server IP address to that of the IP
Office Manager PC and the HTTP Server IP Address to the control unit IP address. This is supported for
up to 5 IP phones.
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Power Supply
The IP phones require a power supply. This is not provided by the IP Office.
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Individual Power Supply Units
An individual power supply unit can be used with each phone. This will require a power supply socket at each
phone location. Note that for phones using a button add-on, for example a EU24 or BM32 an individual power
supply unit is a requirement.
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Power over Ethernet Supply
Most Avaya IP phones can be powered from an 802.3af Power over Ethernet (PoE) power supply. The IP
Office system does not provide PoE ports so a separate PoE switch will be required.