Software; Dhcp And File Servers - Avaya 4600 Series Administrator's Manual

Overview of Voice over IP (VoIP) and Network Protocols
SIP was developed by the IETF. Like H.323, SIP provides for real time audio, video, and data
communications transmission over a packet network. SIP uses various messages, or methods,
to provide:
Registration (REGISTER),
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Call signaling (INVITE, BYE)
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Control signaling (SUBSCRIBE, NOTIFY)
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SIP also supports RTP and RTCP using the Session Description Protocol.
A telephone is loaded with either H.323 or SIP software as part of its initial script file
administration and initialization.

Software

As shipped from the factory, the 4600 Series IP Telephones may not contain the latest software.
When the telephone is first plugged in, a software download from a TFTP or HTTP server starts
to give the telephone its proper functionality.
For downloads of H.323 software upgrades, the PBX provides the capability for a remote restart
of the 4600 Series IP Telephone. As a consequence of restarting, the telephone automatically
restarts reboot procedures. If new software is available on the server, the telephone downloads
it as part of the reboot process.
A 4602, 4602SW, 4602SW+, 4610SW, 4620SW, 4621SW, or 4625SW IP Telephone can
support either H.323 or SIP software, but not both at the same time. All telephones come from
the factory with H.323 software by default. You can convert a telephone from H.323 to SIP, or
from SIP to H.323 by administering your server and settings file. For more information, see
"Converting Software on Avaya 4600 Series IP Telephones" in the 4600 Series IP Telephone
Installation Guide (Document Number 555-233-128).

DHCP and File Servers

The DHCP server provides the following information to the 4600 Series IP Telephone:
IP Address of the 4600 Series IP Telephone
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IP Address of the Gatekeeper board on the Avaya Media Server, applicable only to H.323
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IP telephones
IP Address of the TFTP server if applicable, otherwise the HTTP or HTTPS server
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The subnet mask
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IP Address of the router
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DNS Server IP Address
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Administer the LAN so each IP telephone can access a DHCP server containing the IP
Addresses and subnet mask listed.
34 4600 Series IP Telephone LAN Administrator Guide