I have read that 100 links per page is the limit - past that it's flagged as a link farm. Don't take this as gospel though; I'm sure if you look around you could find someone proclaiming that 5 links is a link farm, and someone else saying it's not a link farm until its 500 links.
Look at your page with your own eyes. Does it look like a link farm to you? If so, break it up into multiple pages. Hub it... rather than linking to *every* page in your cross-linking network, link to pages that only deal with the same niche and a link to the main entryway/doorway/hub front.
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