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Before you Upgrade
RN-001029-02, Release 2.3, Rev 00 3
SIP IP Phone Models 9143i, 9480i, 9480i CT and 5i Series Phones Release Note 2.3
Before you Upgrade
Please Read Before Upgrading the Phones to Release 2.3
Release 2.3 provides several new features for the Aastra IP Phones. However, before upgrading
the phones in your network to Release 2.3, please read the following IMPORTANT information:
• In Release 2.3, LLDP is enabled by default.
If LLDP is enabled on your network, the phones may come up with different network settings.
For more information about LLDP, see “Link Layer Discovery Protocol for Media Endpoint
Devices (LLDP-MED)” on page 7.
• Release 2.3 includes support for DHCP Options 159 and 160.
If the DHCP server supplies Options 159 and 160, the phones will attempt to contact the
configuration server given in these options. For more information about Options 159 and 160,
see “DHCP Options 159 and 160 for the Configuration Server” on page 12.
• Release 2.3 provides HTTPS validation.
If you are using HTTPS and the certificates are not valid or are not signed by Verisign,
Thawte, or GeoTrust, the phones fail to download configuration files. For more information
about HTTPS validation, see “HTTPS Server Certificate Validation” on page 23.
• Release 2.3 includes a Watchdog task feature.
If the phone detects a failure (for example, a crash), the phone automatically reboots. For more
information about Options 159 and 160, see “WatchDog Task Feature” on page 61.
Note: If you factory default a phone with Release 2.3 software, when the
phone reboots, it attempts to connect to rcs.aastra.com. There is no
personal information transmitted from the phone and the phone continues
to boot up as normal.