ADTRAN IP 700 Series Phones Release Notes 2.4.1 IntroductionCopyright © 2013 ADTRAN, Inc. 4IntroductionFirmware version 2.4.1 is a maintenance release that addresses customer issues that were uncovered inprevious code releases.This release is generally available code, meaning that it has been subjected to both design verification andproduct qualification testing. Results obtained during this testing have been evaluated and the code hasbeen determined to be ready for general availability. Caveats discovered during testing but not addressed inthis build are listed in Errata on page 5.A list of new or updated documents for this release appears in Documentation Updates on page 6.Configuration guides, white papers, data sheets, and other documentation can be found on ADTRAN'sSupport Forum, https://supportforums.adtran.com. The contents of these release notes will focus on theplatforms listed below.Supported Platforms• ADTRAN IP 712• ADTRAN IP 706Important NoticesThis section explains important notices about Firmware version 2.4.1.System NotesThis section explains notes regarding the IP 700 Series phones.• This release is not approved for use with NetVanta ECS in Disaster Recovery Applications.• Phones being upgraded from 1.3.x must first be upgraded to version 1.3.16 (available on ADTRAN’swebsite at http://www.adtran.com) before proceeding with upgrading to 2.4.1.• The phone does not use unique session IDs in SDP as required by RFC 4566.• Joining two active calls on a phone using the Conference key is not supported with firmware R2.x.• The IP 700 Series phones do not support status group names with non-alphanumeric characters.• A phone label over 24 characters long or a display name over 15 characters long can overflowcharacters in the SIP From, To, and Contact headers in SIP messages.• When a call is sent to the phone via an unattended transfer, the initial call from the transferring party iscanceled once the transfer completes. This results in a missed call reported on the phone. This isexpected behavior.