ADTRAN sees Q1 revenue slightly up on sequential basis Sees gross margins flat to slightly lower in Q1. Sees GAAP operating expenses slightly up on sequential basis. Says sees "several" bright spots in 2015. Says sees continued growth in Tier 3 space. Sees new product wins, continued growth in Latin America and EMEA. Comments made on the Q4 earnings conference call. ADTRAN is down 1.52% to $22.70 in mid morning trading.