Table Of Contents
Release Notes for Cisco SIP IP Phone 7940/7960 Release 5.0
June 22, 2004
This document lists the known problems in Cisco Session Initiation Protocol (SIP) IP Phone 7940/7960 Release 5.0 and contains information about the Cisco SIP IP Phone 7940/7960 (hereafter referred to as the Cisco SIP IP phone) that is not included in the most recent release of the phone documentation.
This document includes the following sections:
New and Changed Information
New Software Features in Release 5.0
The following new software features are supported in Cisco SIP IP Phone 7940/7960 Release 5.0.
Image Authentication and Signed Binary Files
Cisco has added image authentication to its various IP Phone Protocols. With the addition of image authentication, the binary image can not be tampered with prior to being loaded into the phone. Any tampering with the image causes the phone to fail the authentication process and reject that image. The image authentication is done through signed binary files.
This release does not use regular binary files as did previous releases but only accepts signed binary files. This step improves IP Phone security on the Cisco 7960/40 IP Phones. However, the use of signed binary files does not allow returning to an earlier software release. Once Cisco SIP IP Phone 7940/7960 Release 5.0 is installed, it cannot be replaced with any previous release.
Note After Cisco SIP IP Phone 7940/7960 Release 5.0 is installed, it can only be replaced with the same or newer release. All releases prior to Cisco SIP IP Phone 7940/7960 Release 5.0 will not function on this phone after it has been installed.
Caution Cisco SIP IP Phone 7940/7960 Release 5.0 cannot be downgraded. Before installing Cisco SIP IP Phone 7940/7960 Release 5.0, refer to "Upgrading" first.
For Cisco SIP IP phones, follow the instructions in the "Upgrading the Cisco SIP IP Phone Firmware" section at the following URL:
For these instructions, use P0S3-05-0-00.bin as the image name for Release 5.0. The current images can be found at the following URL:
Note Release 5.0 is packaged as a ZIP archive. Inside the ZIP archive are the .bin (binary) file, .sbn (signed binary) file, any release notes, customer bulletins, guides, and other documents.
Cisco SIP IP Phone 7940/7960 Release 5.0 is functionally equivalent to Cisco SIP IP Phone 7940/7960 Release 4.4 in every way with the exception of the digital signature. The addition of the signed binary files feature prevents downgrading Cisco SIP IP Phone 7940/7960 Release 5.0 to an earlier release.
Customers anticipating a future upgrade to Cisco SIP IP Phone 7940/7960 Release 5.0 or later software are encouraged to first migrate to Cisco SIP IP Phone 7940/7960 Release 4.4. Customers may perform any desired pre-deployment testing using Cisco SIP IP Phone 7940/7960 Release 4.4, including trial deployments, and ensure full compatibility with Cisco SIP IP Phone 7940/7960 Release 5.0. Using this strategy, Cisco SIP IP Phone 7940/7960 Release 5.0 functionality may be tested and deployed using Cisco SIP IP Phone 7940/7960 Release 4.4 software with full downgrade capability before finally converting to signed binary images.
After Cisco SIP IP Phone 7940/7960 Release 5.0 is installed, it can only be replaced with the same or newer release. All releases prior to Cisco SIP IP Phone 7940/7960 Release 5.0 will not function on this phone after it has been installed.
Open Caveats—Release 5.0
No open caveats specific to Cisco IP Phone 7940/7960 Release 5.0 require documentation in these release notes.
Resolved Caveats—Release 5.0
No resolved caveats specific to Cisco IP Phone 7940/7960 Release 5.0 require documentation in these release notes.
These sections explain how to obtain documentation from Cisco Systems.
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Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain online documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.
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Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you with these tasks:
•Streamline business processes and improve productivity
•Resolve technical issues with online support
•Download and test software packages
•Order Cisco learning materials and merchandise
•Register for online skill assessment, training, and certification programs
If you want to obtain customized information and service, you can self-register on Cisco.com. To access Cisco.com, go to this URL:
Technical Assistance Center
The Cisco Technical Assistance Center (TAC) is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two levels of support are available: the Cisco TAC Web Site and the Cisco TAC Escalation Center.
Cisco TAC inquiries are categorized according to the urgency of the issue:
•Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities, product installation, or basic product configuration.
•Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.
•Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available.
•Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.
The Cisco TAC resource that you choose is based on the priority of the problem and the conditions of service contracts, when applicable.
Cisco TAC Web Site
You can use the Cisco TAC Web Site to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to this URL:
All customers, partners, and resellers who have a valid Cisco service contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to this URL to register:
If you are a Cisco.com registered user, and you cannot resolve your technical issues by using the Cisco TAC Web Site, you can open a case online by using the TAC Case Open tool at this URL:
If you have Internet access, we recommend that you open P3 and P4 cases through the Cisco TAC Web Site.
Cisco TAC Escalation Center
The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a case.
To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to this URL:
Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled: for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). When you call the center, please have available your service agreement number and your product serial number.