Release Notes for Cisco Small Business SPA30X and SPA50X IP Phones Firmware Version 7.5.5b
Updated: May 2015
These Release Notes describe the updates and fixes in version 7.5.5b of the Cisco Small Business SPA30X and SPA50X IP Phones firmware.
As with any firmware release, read these release notes before upgrading the firmware. Cisco also recommends backing up configuration before any firmware upgrade.
Before You Upgrade
When upgrading a Cisco SPA50X or Cisco SPA30X IP phone, if you have installed a firmware version prior to 7.5.2b, you must first upgrade to 7.5.2b before you upgrade to release 7.5.3 or to a later release. See the following table for more information.
Firmware Release Installed on Your Phone
Special Instructions for Upgrading to Release 7.5.3 or Later
Upgrade to 7.5.2b first, then upgrade to 7.5.3 or later.
Upgrade Rule Workaround
If you are upgrading using an upgrade rule, the following example can be used to upgrade successfully:
Cisco IP Phone SPA50x local arbitrary code execution vulnerability
Cisco IP Phone Cross-Site Scripting Vulnerability
Open Issues in Firmware Version 7.5.5b
If the font size is 12, then the Hebrew character will be cut off from the top.
NOTE The phone does not support the font size, 12 for Hebrew language.
Behavior During Times of Network Congestion
Anything that degrades network performance can affect voice and video quality, and in some cases, can cause a call to drop. Sources of network degradation can include, but are not limited to, the following activities:
Administrative tasks, such as an internal port scan or security scan
Attacks that occur on your network, such as a Denial of Service attack
To reduce or eliminate any adverse effects to the devices, schedule administrative network tasks during a time when the devices are not being used or exclude the devices from testing.
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