(17) Goodwill

The carrying amount of goodwill by segment as of October 31, 2012 and July 31, 2012 are as follows:



	Telecommunications Transmission		RF Microwave Amplifiers	Mobile Data Communications		Total
Goodwill	$	107,779,000	29,575,000	13,249,000		$	150,603,000
Accumulated impairment	—		—	(13,249,000	)	(13,249,000		)
Balance	$	107,779,000	29,575,000	—		$	137,354,000

For purposes of reviewing impairment and the recoverability of goodwill and other intangible assets, each of our three operating segments constitutes a reporting unit and we must make various assumptions regarding estimated future cash flows and other factors in determining the fair values of the reporting unit. We perform an annual impairment review in the first quarter of each fiscal year.

Based on our annual impairment test performed on August 1, 2012 (the start of our first quarter of fiscal 2013), we determined that none of the goodwill recorded on our Condensed Consolidated Balance Sheet was impaired. Unless events or circumstances change that would more likely than not reduce the fair value of any of our reporting units below their respective carrying value, such as a significant adverse change in our future financial performance or a substantial decline in our stock price, our next annual goodwill impairment test will be performed and completed in the first quarter of fiscal 2014. Any impairment charges that we may record in the future could be material to our results of operations and financial condition.