Redback ( RBAK) posted solid fourth-quarter numbers, slightly beating Wall Street expectations.Shares of the San Jose, Calif., networking gearmaker were largely unchanged in postclose trading Wednesday, having closed the regular session down 12 cents, or 2%, at $6.12. Redback says adjusted net losses for the quarter ended last month were $4.2 million, or 8 cents a share, on sales of $32 million. That compares with a year-ago loss of 13 cents on $21 million in sales. Analysts expected a dime-a-share loss on revenue of $28 million, according to Thomson First Call. On a GAAP basis, fourth-quarter losses totaled $12 million, or 23 cents a share. "We are pleased with the strength of our fourth-quarter results," said CEO Kevin DeNuccio in a press release. The company is expected to provide a discussion of its earnings tally and share its business outlook with analysts on a conference call later Wednesday. Analysts are expecting losses to narrow to 7 cents a share on $29 million in sales for the first quarter ending in March.