Question-and-Answer Session
Operator
Thank you. [Operator Instructions]. Our first question comes from Samuel Wilson. Your line is open. Please state your company name and you may ask your question.
Samuel Wilson - JMP Securities
JMP Securities. Good afternoon gentlemen. Just two questions for you today. Can you give us a sense of what linearity was in the quarter and also can you just give us a sense of how the overall environment if there's been any sort of material change in the last 90 days in terms of the overall demand environment? Thank you.
Andy Reinland - Senior Vice President and Chief Finance Officer
Yes, still on the first question Sam the linearity, we were... the third month it was 49%.
John McAdam - President and Chief Executive Officer
And then the overall environment Sam, no major changes as I mentioned in my script there. We did see some slippage of deals in North American service provider market. That mainly down to the fact that these are larger deals in very, very big projects are controlled frankly as much as in the Enterprise. But overall globally we think it's pretty good and that's why we feel good of the Q4.
Samuel Wilson - JMP Securities
Perfect thank you very much. Good quarter gentlemen.
Operator
Thank you. Inder Singh. Please state your company name and you may ask your question.
Inder Singh - Lehman Brothers
Yes hi. I am at Lehman Brothers. I wanted to ask you a question about really the guidance, the fact that your book-to-bill is greater than one, and you did have some of the resource right to contract perhaps with in timing. It seem to me that perhaps your guidance could be a bit on the conservative side. What's your philosophy on that right now in terms of... are you trying to be conservative. Are there risks that you are trying to quantify in the guidance that perhaps you can give some color on please?
John McAdam - President and Chief Executive Officer
Well we have first of all the guidance is a guidance and we didn't comment on we believe it's conservative, but we obviously... it's our system for providing guidance. It's been pretty affective in the last four to five years. And it's based really on strong pipeline, competitive strength, the bottoms-up forecast and obviously absolute with the real position in Q3 as well. But that's fundamental what we based the guidance on.
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