Table Of Contents
Release Notes for Cisco SIP IP Phone 7940/7960 Release 4.2
New Software Features in Release 4.2
Backup Proxy Registration to Support SIP-SRST
DNS SRV Support for Outbound Proxy
Locking Configuration Mode / Unlocking Configuration Mode
Multiple Product Vulnerabilities Found by PROTOS SIP Test Suite
Obtaining Technical Assistance
Release Notes for Cisco SIP IP Phone 7940/7960 Release 4.2
June 22, 2004
Contents
This document lists the known problems in Cisco Session Initiation Protocol (SIP) IP Phone 7940/7960 Release 4.2 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:
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Obtaining Technical Assistance
New and Changed Information
New Software Features in Release 4.2
The following new software features are supported in Cisco IP Phone 7940/7960 Release 4.2.
UDP Fragmentation Support
The Cisco SIP IP phone supports User Datagram Protocol (UDP) fragmentation, which allows the phone to transmit and receive fragmented UDP packets up to 1932 bytes for use in conjunction with SIP messages.
Backup Proxy Registration to Support SIP-SRST
The SIP phone can register with a backup proxy to support Survivable Remote Site Telephony (SRST). If the main proxy goes down, the backup proxy has the registration information required to route calls successfully.
DNS SRV Support for Outbound Proxy
The SIP phone supports DNS SRV for outbound proxy configuration.
Locking Configuration Mode / Unlocking Configuration Mode
The method for locking and unlocking the configuration changes with Release 4.2 from previous releases.
For more information on the new procedure, refer to the section "Modifying the Network Settings" in the document, Managing Cisco SIP IP Phones.
Multiple Product Vulnerabilities Found by PROTOS SIP Test Suite
Multiple Cisco products contain vulnerabilities in the processing of Session Initiation Protocol (SIP) INVITE messages. These vulnerabilities were identified by the University of Oulu Secure Programming Group (OUSPG) "PROTOS" Test Suite for SIP and can be repeatedly exploited to produce a denial of service.
This vulnerability is repaired in Cisco IP Phone SIP Images P0S3-04-2-00 and later.
For more information, refer to the document at the following URL:
http://www.cisco.com/warp/public/707/cisco-sa-20030221-protos.shtml
Installation Notes
For Cisco SIP IP phones, follow the instructions in the "Upgrading the Cisco SIP IP Phone Firmware" section at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_ipphon/sip7960/sadmin31/sipmntn.htm
For these instructions, use P0S3-04-2-00.bin as the image name for Release 4.2.
Caveats
Open Caveats—Release 4.2
This section documents possible unexpected behavior by Cisco IP Phone 7940/7960 Release 4.2 and describes only severity 1 and 2 caveats and select severity 3 caveats.
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Resolved Caveats—Release 4.2
All the caveats listed in this section are resolved in Cisco IP Phone 7940/7960 Release 4.2. This section lists only severity 1 and 2 caveats and select severity 3 caveats.
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Related Documentation
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Obtaining Documentation
These sections explain how to obtain documentation from Cisco Systems.
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at this URL:
Translated documentation is available at this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation CD-ROM
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual subscription.
Ordering Documentation
You can order Cisco documentation in these ways:
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http://www.cisco.com/cgi-bin/order/order_root.pl
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http://www.cisco.com/go/subscription
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Documentation Feedback
You can submit comments electronically on Cisco.com. In the Cisco Documentation home page, click the Fax or Email option in the "Leave Feedback" section at the bottom of the page.
You can e-mail your comments to bug-doc@cisco.com.
You can submit your comments by mail by using the response card behind the front cover of your document or by writing to the following address:
Cisco Systems
Attn: Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
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.
Cisco.com
Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information, networking solutions, services, programs, and resources at any time, from anywhere in the world.
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:
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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:
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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:
http://www.cisco.com/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:
http://www.cisco.com/tac/caseopen
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:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
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.
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