Table Of Contents
Cisco Unified SIP Phone 3951 and 3911
Release Notes for Firmware Release 8.1(4a)
Updated: September 18, 2009
Use these release notes with the Cisco Unified SIP Phone 3951 and 3911, running firmware release 8.1(4a).
Note The Cisco Unified SIP Phone 3951 is available only in Asia Pacific and Latin American countries.
Firmware release 8.1(4a) is supported by Cisco Unified Communications Manager (Unified CM) releases 7.1, 7.0, 6.1, 6.0, and 5.1.
Note Firmware release 8.1(4a) is designed and tested to interoperate with Cisco call control, most notably Unified CM releases 7.1, 7.0, 6.1, 6.0, and 5.1. Although SIP firmware is IETF RFC 3261 compliant, it is not supported by Cisco TAC or Engineering for use with non-Cisco call control systems.
These release notes provide the following information:
Cisco Unified IP Phone Documentation
Refer to publications that are specific to your language, phone model and Cisco Unified Communications Manager release. Navigate from the following documentation URL:
Cisco Unified Communications Manager Documentation
Refer to the Cisco Unified Communications Manager Documentation Guide and other publications specific to your Cisco Unified Communications Manager release. Navigate from the following URL:
Cisco Unified Communications Manager Business Edition Documentation
Refer to the Cisco Unified Communications Manager Business Edition Documentation Guide and other publications that are specific to your Cisco Unified Communications Manager release. Navigate from the following URL:
New and Changed Information
This section contains information on features introduced in firmware release 8.1(4a).
Note Both of these new features require a minimum Cisco Unified Communications Manager version of 7.1(3).
Daylight Savings Time Calculation Algorithm
Firmware release 8.1(4a) introduces the Daylight Savings Time (DST) Calculation Algorithm to provide a mechanism to handle time zone updates on the Unified CM server without requiring an update for the phone firmware.
When countries change or shift their time zone for DST, it requires additional resources to track and resolve these changes. Defects are opened to track and resolve each DST change; the total number of outstanding defects can increase significantly during certain times of the year when the time zone changes occur very close together.
This feature allows the IP Phone firmware update for each DST change to be completed using a cop file. This cop file contains the required updates for the Unified CM without requiring an a new load for the IP Phone or the Unified CM server.
Maximum Length of Authentication Name
The length of the SIP digest authentication name has been increased to 128 characters for the Cisco Unified SIP Phone 3951 and 3911.
The authentication name is only used if the Enable Digest Authentication checkbox is checked in the Phone Security Profile Configuration window. The authentication name is derived from the User ID of the end user assigned to the phone.
Where to find more information
•Cisco Unified IP Phone Administration Guide
•Cisco Unified Communications Manager Administration Guide
This section contains information on installing firmware release 8.1(4a).
Installing Firmware Release 8.1(4a) on Cisco Unified Communications Manager
This section describes how to install firmware release 8.1(4a) on Cisco Unified Communications Manager.
Firmware Installation Procedure
Before using the Cisco Unified SIP Phone 3951 and 3911 with Cisco Unified Communications Manager, you must install the latest firmware on all Cisco Unified Communications Manager servers in the cluster.
To download and install the firmware, follow these steps:
Step 1 To access the firmware files, go to this URL:
Step 2 Log in to the Tools and Resources Download page.
Step 3 Choose the IP Telephony folder by clicking +.
Step 4 Choose IP Phones > Cisco Unified SIP Phones 3900 Series.
Step 5 Choose your phone type.
Step 6 Choose Session Initiation Protocol (SIP).
Step 7 Under the Latest Releases folder, choose 8.1(4a).
Step 8 To download the SIP firmware for the Cisco Unified IP Phone, click the Download Now or Add to cart button and follow the prompts.
Note If you added the firmware file to the cart, click the Download Cart link when you are ready to download the file.
Step 9 Click the + next to the firmware file name in the Download Cart section to access additional information about this file.The hyperlink for the Readme file is in the Additional Information section, which contains installation instructions for the corresponding firmware.
Step 10 Follow the instructions in the Readme file to install the firmware.
This section contains important notes for firmware release 8.1(4a).
DTMF Support on Cisco Unified SIP Phone 3951 and 3911
In order to support dual tone multi-frequency (DTMF), Cisco Unified SIP Phone 3951 and 3911 require the use of gateways with media termination point (MTP) transcoders that support RFC 2833, such as the Cisco 3825 Router. You can configure the system to support DTMF by either configuring the MTP on a transcoding device that supports RFC 2833 or by checking the Require DTMF Reception check box for each registered Cisco Unified SIP Phone 3951 and 3911 in Cisco Unified Communications Manager Administration, Phone Configuration window.
This section contains these topics:
Using Bug Toolkit
Known problems (bugs) are graded according to severity level. These release notes contain descriptions of:
•All severity level 1 or 2 bugs.
•Significant severity level 3 bugs.
You can search for problems by using the Cisco Software Bug Toolkit.
To access Bug Toolkit, you need the following items:
•Cisco.com user ID and password
To use the Software Bug Toolkit, follow these steps:
Step 1 To access the Bug Toolkit, go to http://tools.cisco.com/Support/BugToolKit/action.do?hdnAction=searchBugs.
Step 2 Log on 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 bug ID field, then click Go.
There are no open caveats for firmware release 8.1(4a).
Table 1 lists Severity 1, 2 and 3 defects that are resolved for the Cisco Unified SIP Phone 3951 and 3911 firmware release 8.1(4a).
For more information about an individual defect, you can access the online record for the defect by clicking the Identifier or going to the URL shown. You must be a registered Cisco.com user to access this online information.
Because defect status continually changes, be aware that Table 1 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 the Using Bug Toolkit.
This section provides documentation changes that were unavailable when the Cisco Unified SIP Phone documentation was released.
Shared Line Support
Shared lines are not supported on Cisco Unified SIP Phone 3951 and 3911. The following guides erroneously state that shared lines are supported:
•Cisco Unified SIP Phone 3951 Administration Guide for Cisco Unified Communications Manager 6.0 and 5.1
•Cisco Unified SIP Phone 3951 Phone Guide for Cisco Unified Communications Manager 6.0 and 5.1
•Cisco Unified SIP Phone 3911 Administration Guide for Cisco Unified Communications Manager 6.0 and 5.1
•Cisco Unified SIP Phone 3911 Phone Guide for Cisco Unified Communications Manager 6.0 and 5.1
Mute Button Reference
In the "Understanding Buttons and Hardware" section of the Cisco Unified SIP Phone 3951 Phone Guide for Cisco Unified Communications Manager 6.0 and 5.1 and Cisco Unified SIP Phone 3911 Phone Guide for Cisco Unified Communications Manager 6.0 and 5.1, there is an erroneous reference to the "Using the Handset and Speakerphone" section for the Mute Button. The correct reference is the "Using Mute" section.
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
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