The U.S. Equal Employment Opportunity Commission said on Tuesday it had sued Vonage Holdings Corp. (VG.N: Quote, Profile, Research), alleging the company discriminated against a Jewish employee and fired him.

The suit compounds the Internet phone company’s legal woes after a patent infringement case. Vonage is appealing a ruling that it infringed on Verizon Communications Inc.’s (VZ.N: Quote, Profile, Research) patents.

The commission alleged in its complaint filed in federal court in New Jersey that Vonage subjected Mikhail Rozenberg to discrimination on the basis of his faith — Orthodox Judaism — by refusing to accommodate his religion in training sessions and work shifts.

A Vonage spokesman said he had not seen the suit and could not comment.

Rozenberg was hired by Vonage in September 2005 as a technical service agent, the commission said.

Vonage knew when it hired him that he was Jewish and needed to work during times that did not conflict with his religious observances, the commission said.

But the company refused to allow Rozenberg, for religious observances,

to miss two days of a six-week training program despite a policy of allowing other employees to miss sessions with proper documentation, the commission alleged.

Vonage also told him that he was not a “good fit” and that when he stopped practicing his religion he could come back, the commission alleged.

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