ADTRAN (Nasdaq: ADTN) reported earnings on Jan. 18. Here are the numbers you need to know.

The 10-second takeaway
For the quarter ended Dec. 31 (Q4), ADTRAN met expectations on revenues and beat expectations on earnings per share.

Compared to the prior-year quarter, revenue increased, and earnings per share dropped.

Margins dropped across the board.

Revenue details
ADTRAN booked revenue of $175 million. The 19 analysts polled by S&P Capital IQ anticipated revenue of $175 million. Sales were 6.0% higher than the prior-year quarter's $165 million.

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Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions.

EPS details
EPS came in at $0.48. The 16 earnings estimates compiled by S&P Capital IQ anticipated $0.46 per share. GAAP EPS of $0.48 for Q4 were 12% lower than the prior-year quarter's $0.55 per share.

Source: S&P Capital IQ. Quarterly periods. Figures may be non-GAAP to maintain comparability with estimates.

Margin details
For the quarter, gross margin was 56.6%, 200 basis points worse than the prior-year quarter. Operating margin was 23.5%, 360 basis points worse than the prior-year quarter. Net margin was 17.8%, 400 basis points worse than the prior-year quarter.

Looking ahead
Next quarter's average estimate for revenue is $177 million. On the bottom line, the average EPS estimate is $0.47.

Next year's average estimate for revenue is $805 million. The average EPS estimate is $2.26.

Investor sentiment
The stock has a four-star rating (out of five) at Motley Fool CAPS, with 166 members out of 185 rating the stock outperform, and 19 members rating it underperform. Among 57 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 53 give ADTRAN a green thumbs-up, and four give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on ADTRAN is outperform, with an average price target of $35.59.

Seth Jayson had no position in any company mentioned here at the time of publication. You can view his stock holdings here. He is co-advisor of Motley Fool Hidden Gems, which provides new small-cap ideas every month, backed by a real-money portfolio. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.