**Exhibit 31.2**

**CERTIFICATION      **

| 1. | I                have reviewed this Quarterly Report on Form 10-Q of AltiGen                Communications, Inc.; |
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| 2. | Based                on my knowledge, this report does not contain any untrue statement                of a                material fact or omit to state a material fact necessary to make                the                statements made, in light of the circumstances under which such statements                were made, not misleading with respect to the period covered by this                report; |
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| 3. | Based                on my knowledge, the financial statements, and other financial information                included in this report, fairly present in all material respects                the                financial condition, results of operations and cash flows of the                registrant as of, and for, the periods presented in this report; |
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| 4. | The                registrants other certifying officer(s) and I are responsible for                establishing and maintaining disclosure controls and procedures (as                defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the                registrant and have: |
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|   | (a) | Designed                such disclosure controls and procedures, or caused such disclosure                controls and procedures to be designed under our supervision, to                ensure                that material information relating to the registrant, including its                consolidated subsidiaries, is made known to us by others within those                entities, particularly during the period in which this report is                being                prepared; |
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|   | (b) | Evaluated                the effectiveness of the registrants disclosure controls and procedures                and presented in this report our conclusions about the effectiveness                of                the disclosure controls and procedures, as of the end of the period                covered by this report based on such evaluation; and |
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|   | (c) | Disclosed                in this report any change in the registrants internal control over                financial reporting that occurred during the registrants most recent                fiscal quarter (the registrant’s fourth fiscal quarter in the case of an                annual report) that has materially affected, or is reasonably likely                to                materially affect, the registrants internal control over financial                reporting; and  |
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| 5. | The                registrants other certifying officer(s) and I have disclosed, based                on our                most recent evaluation of internal control over financial reporting,                to                the registrants auditors and the audit committee of the registrants                board                of directors (or persons performing the equivalent functions): |
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|   | (a) | All                significant deficiencies and material weaknesses in the design or                operation of internal control over financial reporting which are                reasonably likely to adversely affect the registrants ability to                record,                process, summarize and report financial information; and |
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| Date:                May 15, 2006                                           |   |   |   |
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| By:                   /s/ Philip                M. McDermott |   |   |   |
| Philip                M. McDermottChief                Financial Officer         |   |   |        |

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