Comcast ( CMCSA) beat second-quarter targets, posting what it called record unit growth. The Philadelphia-based cable operator made $460 million, or 22 cents a share, in the quarter ended June 30, up from the year-ago $430 million, or 19 cents a share. Revenue rose to $6.23 billion from $5.6 billion a year earlier. Analysts surveyed by Thomson Financial were looking for a 20-cent profit on sales of $6.13 billion. Operating cash flow rose 12% from a year ago to $2.43 billion. At Comcast's cable unit, revenue rose 11% to $5.95 billion, operating cash flow rose 14% to $2.46 billion and revenue generating unit additions soared 61% to 816,000. "Record results for the second quarter highlight the continued strength of our business and the power of our connection to our customers. This terrific performance included another quarter of double-digit revenue and Operating Cash Flow growth and the highest level of second quarter RGU additions in the Company's history," said CEO Brian Roberts. "In particular, the rapid growth of Comcast Digital Voice demonstrates its massive appeal -- and we are just getting started. As we continue to roll out our triple play offer, we are now more confident than ever that it represents a meaningful engine for growth and a significant advantage over our competition." In video, Comcast added 350,000 new digital subscribers during the quarter as digital penetration reached 49% of basic video subscribers. Video revenue increased 8% to $3.7 billion, reflecting growth in digital customers and increased demand for more digital and interactive features. Comcast ended the quarter with 10.5 million digital video subscribers, a 15% increase from one year ago. High-speed Internet revenue increased 22% to $1.2 billion, reflecting a 20% increase in subscribers from the prior year and stable average monthly revenue per subscriber. The company added 305,000 high-speed Net users during the quarter.