SIP Release 4.4 for Avaya 1100 and 1200 Series IP deskphones was made generally available in October 2013; Service Pack 1 was issued in April 2014; Service Pack 2 was issued in September 2014; Service Pack 3 was issued in March 2015; Service Pack 4 was issued in August 2015; Service Pack 5 was issued in April 2016; Service Pack 6 was issued in October 2016; Service Pack 7 was issued in April 2017; Service Pack 8 was issued in August 2017; Service Pack 9 was issued in January 2018; Service Pack 10 was issued in June 2018; Service Pack 12 was issued in August 2019. This is the latest release of SIP software for installation on Avaya 1200 Series IP deskphones and is recommended for new development. This is NOT the latest release of SIP software for installation on Avaya 1100 Series IP deskphones. The latest release is recommended for new development.
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