This excerpt taken from the CMTL 10-K filed Sep 20, 2006.
Our earnings and cash flows are subject to fluctuations due to changes in interest rates, primarily from our investment of available cash balances. Under our current policies, we do not use interest rate derivative instruments to manage exposure to interest rate changes. If the interest rate we receive on our investment of available cash balances were to change by 10%, our interest income would be impacted by approximately $1.1 million.
Our 2.0% convertible senior notes bear a fixed rate of interest. As such, our earnings and cash flows are not sensitive to changes in interest rates on our long-term debt.