Cisco Unified SIP Phone 3911 Release Notes for Firmware Release 8.1(1b)
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Table of Contents
Cisco Unified SIP Phone 3911 Release Notes for Firmware Release 8.1(1b)
DTMF Support on Cisco Unified SIP Phone 3911
Supported Cisco Unified Communications Manager Versions
Cisco Unified Communications Manager Device Packs
Phone Behavior During Times of Network Congestion
Obtaining Documentation, Obtaining Support, and Security Guidelines
Cisco Product Security Overview
Cisco Unified SIP Phone 3911
Release Notes for Firmware Release 8.1(1b)
Use these release notes with the Cisco Unified SIP Phone 3911, running firmware release 8.1(1b).
Firmware release 8.1(1b) is supported by Cisco Unified Communications Manager releases 6.0 and 5.1.
Note
Firmware release 8.1(1b) is designed and tested to interoperate with Cisco call control, most notably Cisco Unified Communications Manager releases 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.
Related Documentation
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:
http://www.cisco.com/en/US/products/ps7193/tsd_products_support_series_home.html
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:
http://www.cisco.com/en/US/products/sw/voicesw/ps556/tsd_products_support_series_home.html
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:
http://www.cisco.com/en/US/products/ps7273/tsd_products_support_series_home.html
Important Notes
This section contains these topics:
Shared Line Support
Shared lines are not supported on Cisco Unified SIP Phone 3911. The Cisco Unified SIP Phone 3911 Administration 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 erroneously state that shared lines are supported.
DTMF Support on Cisco Unified SIP Phone 3911
Cisco Unified SIP Phone 3911 requires the use of gateways with media termination point (MTP) transcoders that support RFC 2833, such as the Cisco 3825 Router in order to support dual tone multi-frequency (DTMF). 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 3911 in Cisco Unified Communications Manager Administration, Phone Administration window.
Installation Notes
This section provides information on supported Cisco Unified Communications Manager versions and device packs.
Supported Cisco Unified Communications Manager Versions
This Cisco Unified SIP Phone 3911 firmware release is supported with Cisco Unified Communications Manager release 6.0 and 5.1.
Limitations and Restrictions
Phone Behavior During Times of Network Congestion
Anything that degrades network performance can affect Cisco IP Phone 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 phones, schedule administrative network tasks during a time when the phones are not being used or exclude the phones from testing.
Caveats
This section contains these topics:
Using Bug Toolkit
Known problems (bugs) are graded according to severity level. These release notes contain descriptions of:
You can search for problems by using the Cisco Software Bug Toolkit.
To access Bug Toolkit, you need the following items:
To use the Software Bug Toolkit, follow these steps:
Step 1
Step 2
Step 3
Obtaining Documentation, Obtaining Support, and Security Guidelines
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Cisco Product Security Overview
This product contains cryptographic features and is subject to United States and local country laws governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption. Importers, exporters, distributors and users are responsible for compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at: http://www.cisco.com/wwl/export/crypto/tool/stqrg.html. If you require further assistance please contact us by sending email to export@cisco.com.
Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.
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