001 - Document - Document and Entity Information link:presentationLink link:definitionLink link:calculationLink 002 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:definitionLink link:calculationLink 003 - Statement - CONSOLIDATED BALANCE SHEETS (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 004 - Statement - CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME link:presentationLink link:definitionLink link:calculationLink 005 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:definitionLink link:calculationLink 006 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:definitionLink link:calculationLink 007 - Disclosure - NATURE OF BUSINESS link:presentationLink link:definitionLink link:calculationLink 008 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:definitionLink link:calculationLink 009 - Disclosure - PATENT RELATED INCOME link:presentationLink link:definitionLink link:calculationLink 010 - Disclosure - DISCONTINUED OPERATIONS link:presentationLink link:definitionLink link:calculationLink 011 - Disclosure - INVENTORIES link:presentationLink link:definitionLink link:calculationLink 012 - Disclosure - PROPERTY AND EQUIPMENT link:presentationLink link:definitionLink link:calculationLink 013 - Disclosure - INCOME TAXES link:presentationLink link:definitionLink link:calculationLink 014 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS link:presentationLink link:definitionLink link:calculationLink 015 - Disclosure - COMMITMENTS AND CONTINGENT LIABILITIES link:presentationLink link:definitionLink link:calculationLink 016 - Disclosure - BUSINESS SEGMENTS AND MAJOR CUSTOMERS link:presentationLink link:definitionLink link:calculationLink 017 - Disclosure - EMPLOYEE BENEFIT PLAN link:presentationLink link:definitionLink link:calculationLink 018 - Disclosure - NET INCOME PER SHARE link:presentationLink link:definitionLink link:calculationLink 019 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS link:presentationLink link:definitionLink link:calculationLink 020 - Disclosure - QUARTERLY RESULTS OF OPERATIONS UNAUDITED link:presentationLink link:definitionLink link:calculationLink 021 - Disclosure - OFF-BALANCE SHEET ARRANGEMENTS link:presentationLink link:definitionLink link:calculationLink 022 - Schedule - Schedule of valuation and qualifying accounts link:presentationLink link:definitionLink link:calculationLink 023 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:definitionLink link:calculationLink 024 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:definitionLink link:calculationLink 025 - Disclosure - DISCONTINUED OPERATIONS (Tables) link:presentationLink link:definitionLink link:calculationLink 026 - Disclosure - INVENTORIES (Tables) link:presentationLink link:definitionLink link:calculationLink 027 - Disclosure - PROPERTY AND EQUIPMENT (Tables) link:presentationLink link:definitionLink link:calculationLink 028 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:definitionLink link:calculationLink 029 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS (Tables) link:presentationLink link:definitionLink link:calculationLink 030 - Disclosure - BUSINESS SEGMENTS AND MAJOR CUSTOMERS (Tables) link:presentationLink link:definitionLink link:calculationLink 031 - Disclosure - NET INCOME PER SHARE (Tables) link:presentationLink link:definitionLink link:calculationLink 032 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables) link:presentationLink link:definitionLink link:calculationLink 033 - Disclosure - QUARTERLY RESULTS OF OPERATIONS UNAUDITED (Tables) link:presentationLink link:definitionLink link:calculationLink 061 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS (Detail Textuals 4) link:presentationLink link:definitionLink link:calculationLink 034 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Assets measured at fair value on recurring basis (Details) link:presentationLink link:definitionLink link:calculationLink 035 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Estimated useful lives of assets (Details 1) link:presentationLink link:definitionLink link:calculationLink 036 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of credit risk (Details 2) link:presentationLink link:definitionLink link:calculationLink 037 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 038 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals 1) link:presentationLink link:definitionLink link:calculationLink 039 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals 2) link:presentationLink link:definitionLink link:calculationLink 040 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals 3) link:presentationLink link:definitionLink link:calculationLink 041 - Disclosure - PATENT RELATED INCOME (Detail Textuals ) link:presentationLink link:definitionLink link:calculationLink 042 - Disclosure - PATENT RELATED INCOME (Detail Textuals 1) link:presentationLink link:definitionLink link:calculationLink 043 - Disclosure - DISCONTINUED OPERATIONS - Income (loss) from discontinued operations attributable to DSL service (Details) link:presentationLink link:definitionLink link:calculationLink 044 - Disclosure - DISCONTINUED OPERATIONS (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 045 - Disclosure - INVENTORIES - Summary of inventories (Details) link:presentationLink link:definitionLink link:calculationLink 046 - Disclosure - PROPERTY AND EQUIPMENT - Summary of property and equipment (Details) link:presentationLink link:definitionLink link:calculationLink 047 - Disclosure - PROPERTY AND EQUIPMENT (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 048 - Disclosure - INCOME TAXES - Components of provision for income taxes (Details) link:presentationLink link:definitionLink link:calculationLink 049 - Disclosure - INCOME TAXES - Reconciliation of U.S. federal statutory rate (Details 1) link:presentationLink link:definitionLink link:calculationLink 050 - Disclosure - INCOME TAXES - Principal components of deferred tax assets (Details 2) link:presentationLink link:definitionLink link:calculationLink 051 - Disclosure - INCOME TAXES - Rollforward of uncertain tax position (Details 3) link:presentationLink link:definitionLink link:calculationLink 052 - Disclosure - INCOME TAXES (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 053 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS - Stock-based employee compensation expenses (Details) link:presentationLink link:definitionLink link:calculationLink 054 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS - Assumptions used to determine fair value of options (Details 1) link:presentationLink link:definitionLink link:calculationLink 055 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS - Summary of stock option transactions (Details 2) link:presentationLink link:definitionLink link:calculationLink 056 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS - Summarizes of stock options outstanding (Details 3) link:presentationLink link:definitionLink link:calculationLink 057 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 058 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS (Detail Textuals 1) link:presentationLink link:definitionLink link:calculationLink 059 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS (Detail Textuals 2) link:presentationLink link:definitionLink link:calculationLink 060 - Disclosure - EQUITY AND STOCK COMPENSATION PLANS (Detail Textuals 3) link:presentationLink link:definitionLink link:calculationLink 062 - Disclosure - COMMITMENTS AND CONTINGENT LIABILITIES (Detail Textuals ) link:presentationLink link:definitionLink link:calculationLink 063 - Disclosure - BUSINESS SEGMENTS AND MAJOR CUSTOMERS - Revenues generated from geographic regions (Details) link:presentationLink link:definitionLink link:calculationLink 064 - Disclosure - BUSINESS SEGMENTS AND MAJOR CUSTOMERS - Summary of revenue by product group (Details 1) link:presentationLink link:definitionLink link:calculationLink 065 - Disclosure - BUSINESS SEGMENTS AND MAJOR CUSTOMERS - Revenue derived from major customers (Details 2) link:presentationLink link:definitionLink link:calculationLink 066 - Disclosure - EMPLOYEE BENEFIT PLAN (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 067 - Disclosure - NET INCOME PER SHARE - Calculation of net income per share (Details) link:presentationLink link:definitionLink link:calculationLink 068 - Disclosure - NET INCOME PER SHARE (Detail Textuals) link:presentationLink link:definitionLink link:calculationLink 069 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS - Components of accumulated other comprehensive loss and activity (Details) link:presentationLink link:definitionLink link:calculationLink 070 - Disclosure - QUARTERLY RESULTS OF OPERATIONS - UNAUDITED - Summary of consolidated statements of comprehensive income (Details) link:presentationLink link:definitionLink link:calculationLink 071 - Schedule - Schedule of valuation and qualifying accounts (Details) link:presentationLink link:definitionLink link:calculationLink