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Updated:April 16, 2018
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
Release Notes for Cisco Small Business SPA30X, SPA50X, and SPA51X IP Phone Firmware Release 7.6(2)SR4
First Published: April 18, 2018
This document describes the updates and fixes in Cisco Small Business SPA30X, SPA50X, and SPA51X IP Phone Firmware Release 7.6(2)SR4.
As with any firmware release, read these release notes before you upgrade the firmware. We also recommend that you back up the configuration before you perform any firmware upgrade.
Before You Upgrade
When you upgrade a Cisco SPA50X or Cisco SPA30X IP Phone that is running a release prior to 7.5.2b, you must first upgrade to 7.5.2b before you upgrade 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
7.5.2b or later
Upgrade to 7.5.2b first, then upgrade to 7.5.3 or later.
Firmware Release 7.6(2)SR4 includes all customer-found defects that have been fixed after firmware release 7.6(2)SR3. For SPA5x5, the openssl upgrades to openssl-0.9.8zh.
New and Changed Features
There are no new or changed features in this release.
This section describes the resolved and open caveats, and provides information on accessing the Cisco Software Bug Toolkit.
Access Cisco Bug Search
Known problems (bugs) are graded according to severity level. These release notes contain descriptions of the following:
All severity level 1 or 2 bugs
Significant severity level 3 bugs
You can search for problems by using the Cisco Bug Search.
Before You Begin
To access Cisco Bug Search, you need the following items:
Step 2 Log in with your Cisco.com user ID and password.
Step 3 To look for information about a specific problem, enter the bug ID number in the Search for field, then press Enter.
There are currently no open defects for the Cisco Small Business SPA30X, SPA50X, and SPA51X for Firmware Release 7.6(2)SR4.
The following table lists severity 1, 2, and 3 defects that are resolved for the Cisco Small Business SPA30X, SPA50X, and SPA51X for Firmware Release 7.6(2)SR4.
For more information about an individual defect, search for the caveat in the Bug Search Toolkit. You must be a registered Cisco.com user to access this online information.
Because defect status continually changes, the table reflects a snapshot of the defects that were resolved at the time this report was compiled. For an updated view of resolved defects, access Bug Toolkit as described in Access Cisco Bug Search.
VxWorks DHCP and DNS Vulnerabilities - SPA300 - SPA500
"MBUF OVFL" issue when a NOTIFY hits the phone
SPA 50x phones 'SUBSCRIBE' Not working with Huawei SBC
Intermittently provisioning rule resync period takes longer to contact server
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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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.