Avaya 9600 Series - Page 16

DHCP processing
If an IP address has not been manually configured in the phone, the phone initiates DHCP, as
described in Administering the DHCP and File Servers on page 50. Among other data passed to
the phone is the IP address of the HTTP or HTTPS server.
Related links
Initialization process overview on page 15
File downloads
9600 Series IP Deskphones use the HTTP server to download the firmware, the language files,
and the certificate files. The HTTPS server is used to download configuration files, and to backup
or restore user information. The phone first downloads an upgrade, configuration file to identify the
latest software files. Then, the phone downloads a settings, configuration file to identify the
required language files and/or certificate files. Finally, the phone downloads software files
depending on the software in the phone and if it is the same as that specified in the upgrade file.
For more information about the download process and settings file, see
Telephone Software and
Application Files on page 65.
Related links
Initialization process overview on page 15
Certificates usage
The H.323-based 9600 Series IP Deskphones use certificates to verify the authenticity of the
following:
• HTTPS file server for downloaded configuration files, and user backup and restore files.
• H.323 signaling over TLS.
• VPN, when certificate authentication method is used.
• SLAMon server.
• SSO applications.
• 802.1x EAP-TLS.
Related links
Initialization process overview on page 15
Certificate revocation on page 16
Certificate revocation
The certificates are published by the certificate authority with information about the revocation
status. The deskphones use Online Certificate Status Protocol (OCSP) to verify the revocation
status of all the certificates in the chain between the server certificate and the root certificate. The
root certificate is not verified. The revocation check of the certificates is done by sending HTTP or
HTTPS requests to the OCSP server.
The certificates may or may not include the authority information access (AIA) extension.
Administration overview and requirements
March 2018 Administering Avaya 9608/9608G/9611G/9621G/9641G/9641GS IP Deskphones H.
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