Ladies and gentlemen, thank you for standing by, and welcome to NetScout's first quarter of 2018 results conference call. At this time, all parties are in a listen-only mode until the question and answer portion of the call. As a reminder, this call is being recorded. Andrew Kramer, Vice President of Investor Relations, and his colleagues at NetScout are on the line with us today. If you require operator assistance at any time, please press star and zero. I would now like to turn the call over to Andrew Kramer to begin the company's prepared remarks.
Great. Thank you, Dave. Good morning, everyone. Welcome to NetScout's first quarter fiscal year 2018 conference call for the period ended June 30, 2017. As usual, I'm joined today by Anil Singhal, NetScout's Co-founder, President, and CEO; Michael Szabados, NetScout's Chief Operating Officer; and Jean Bua, NetScout's Executive Vice President and Chief Financial Officer. There is a slide presentation that accompanies our prepared remarks, which can be accessed on the investor relations section of our website at www.netscout.com. The slides can be advanced in the webcast viewer to follow along with our commentary. We will call out the slide number we are referencing in our remarks. Today's agenda will be consistent with prior quarters. Our CEO, Anil Singhal, will share his perspective on our results and recent highlights. Our COO, Michael Szabados, will briefly discuss key wins and go-to-market developments.
Our CFO, Jean Bua, will then review our first quarter results and our fiscal year 2018 guidance. Moving on to slide number three, I would like to remind everybody listening that forward-looking statements as part of this communication are made pursuant to the safe harbor provisions of Section 21E of the Securities Exchange Act of 1934, as amended, other federal securities laws. Investors are cautioned that statements in this call, which are not strictly historical statements, including, but not limited to, the statements related to the financial guidance and expectations for NetScout, market conditions and customer demand, anticipated revenue from specific customers, all of the other various product development, sales, and marketing, expense management, and other initiatives planned for fiscal year 2018 and beyond, constitute forward-looking statements which involve risks and uncertainties.
Actual results could differ materially from the forward-looking statements due to known and unknown risks, uncertainties, assumptions, and other factors. This slide details these factors, I strongly encourage you to review each and every one of them. For a more detailed description of the company's risk factors, please refer to the company's annual report on Form 10-K for the fiscal year ended March 31, 2017, which is on file with the Securities and Exchange Commission. NetScout assumes no obligation to update any forward-looking information contained in this communication or with respect to the announcements described herein. Let's turn to slide number four, which involves our non-GAAP metrics. While this slide presentation includes both GAAP and non-GAAP results, unless otherwise stated, financial information discussed on today's conference call will be on a non-GAAP basis only.
This slide, which we also encourage you to read, provides information about the use of GAAP and non-GAAP measures because non-GAAP measures are not intended to be superior to or a substitute for the equivalent GAAP metric. Non-GAAP items are described and reconciled to GAAP results in today's press release, and those and other reconciliations and supplemental detail are included at the end of the slide presentation, which again is available on our website. As we detailed in our press release today, our first quarter results were consistent with our expectations entering the quarter. We made excellent progress on our product roadmaps, delivering a slate of new products and capabilities to the marketplace. We've been pleased thus far with the strong interest and positive feedback on these offerings from customers and prospects. With that as the high-level background, I'll now turn the call over to Anil. Anil?
Thank you, Andy. Good morning, everyone, and thank you for joining us. Let's begin on slide six with a recap of our non-GAAP results. NetScout's first quarter performance was generally in line with the plans entering the quarter, with revenue coming in at $228.8 million, a gross margin of 75.9%, an operating profit margin of 6.3%, and diluted EPS of $0.08 per share. Jean will review our performance in more detail, but I'll share a few observations. Total revenue declined by 18%, which was consistent with the guidance we provided last quarter. A significant majority of this decrease versus last year was related to the ongoing moderation in spending by one of our tier 1 carrier customers. Our gross margin improved by three percentage points, primarily due to favorable shifts in product mix as we begin to see the benefits of our product strategy.
In terms of profitability, we balance ongoing expense management with investment in major development and go-to-market activities. Overall, we are very pleased with the progress we made over the past several months to drive innovation and elevate our value proposition. Since holding our annual sales kickoff and user conference events in early April to start the quarter, we have officially introduced a number of exciting new products. Let's move to slide number seven to cover this progress in more detail. As many of you know, our approach to collecting and analyzing network traffic or wire data is differentiated by our patented Adaptive Service Intelligence, or ASI technology, which instantly converts high volume network traffic at the collection point into highly structured, multidimensional metadata, or what we call smart data.
We are using this smart data to power an expanding range of analytics spanning network performance, application performance, cybersecurity, and big data. During the past two years, we have applied ASI to the technologies and capabilities we acquired as part of the Danaher communication business, including best-in-class analytics for session trace for forensics, radio access network optimization, customer experience management, Wi-Fi monitoring, infrastructure performance management, and advanced security threat. We believe this approach offers compelling value to our customers. First, it provides investment protection because our new platform is designed to support their legacy workflows. Just as important, it provides customers with next-generation capabilities that address important new use cases and helps facilitate more pervasive instrumentation of their networks.
The first proof point of our smart data strategy occurred last fall with the launch of our real-time information platform called the InfiniStream NG, which is available in multiple form factors and deployment options. The software-only version of this platform continues to gain traction in the service provider market because it enables these customers to maximize the utilization of their service assurance budgets and instrument their network more broadly than using traditional hardware probes. At the same time, these developments are typically negotiated as multi-year purchase agreements, which helps us fortify our incumbency while also providing us with improved revenue visibility. We also expect that the deals that we have closed thus far will yield comparable or even higher revenue against prior year spends and superior profitability in terms of absolute gross margin in gross profit dollars.
Additionally, we are seeing that when customers standardize on this new platform, they are more likely to purchase other complementary products from us. The list of service providers who are now deploying the InfiniStream NG software has continued to grow, and Michael will recap another win that we secured in the Asia Pacific region. We continue to expect that the software-only version of InfiniStream NG will represent between 8%-10% of product revenue in FY 2018, with much of that contribution coming in the second half of the year. Just as important, we anticipate that the adoption of a new platform will help drive better gross margins this year.
During the past several months, we have launched a range of innovative new offerings that can extend our customers' visibility from the core of their infrastructure out to the edge of their networks and amplify the value of our smart data through new high-value analytics. We first showcased these new products at our annual user conference and have subsequently marketed them at major industry events and in customer briefings. The feedback on these new offerings from customers, prospects, partners, and industry experts has been resoundingly positive. We are very excited about the value proposition for each of these new offerings, and we plan to highlight many of them on future quarterly calls as they gain traction. This morning, I want to briefly review why we are especially optimistic about the potential of our new cloud offerings called vSTREAM, vSCOUT, and virtual nGeniusONE.
These represent the industry's first product to extend application assurance for off-the-shelf app or custom applications, regardless of whether they run in physical or virtual data centers or in the cloud. By providing deeper visibility into the interactions of many components of modern applications, regardless of how or where they are deployed, we can help customers simplify and assure the success of cloud migration projects, successfully monitor services running across complex hybrid cloud environments, and efficiently extend visibility into their traditional application infrastructures. We are very pleased to have already closed our first sale of this offering, and Michael will profile this win in a moment. This brings us to our outlook, which is covered on slide eight. Overall, we made substantial progress on our development roadmap during this past quarter to largely complete our newest product cycle.
We are excited about the potential of our smart data strategy to help customers fully harness the power of IP networking and position NetScout as a strategic partner with proven business assurance solutions that will help them monitor, manage, and protect their technology infrastructure. To capitalize on the potential we see for these new products, we will continue to advance key sales and marketing initiatives. For example, as we move forward, we intend to cross-sell Arbor's offering into NetScout installed base of customers, advance campaigns to win new accounts, and leverage our strong position in network operations to sell into different senior level decision makers within our installed base of customers. Although it will take time for these activities to build momentum, we are confident that our value proposition will resonate in the marketplace over the coming quarters.
We are also dedicating resources to help guide our longer-term development maps in ways that will help us capitalize on emerging technologies and new markets such as Internet of Things, 5G, virtualization, and machine learning. Looking ahead, our outlook for fiscal year 2018 is fundamentally unchanged, although our EPS guidance was updated slightly to reflect the quarter share repurchase activity. While the business has tracked according to plan thus far, we recognize there is a lot of work left to do in order to achieve our targets in fiscal year 2018. We continue to expect that majority of our revenue and profits will be delivered during the second half of the fiscal year, which is consistent with the historical trends in our business. Jean will provide some additional details on our outlook in a few minutes.
At this point, I will turn the call over to Michael for a recap of our key customer wins and go-to-market activities.
Thank you, Anil, and good morning, everyone. Slide number 10 outlines the areas that I will cover. Moving into this fiscal year, that is 2018, one of our top priorities has been to fortify our incumbency with service providers by driving adoption of our software-only platform. We are continuing to make progress on that front. During the past several months, a major mobile operator in the Asia Pacific region selected and began deploying our InfiniStreamNG software as part of its strategy to improve overall network quality. The former TekCom's business was an incumbent of this account but had seen its revenue drop to insignificant levels in recent years after a multi-year period of aggressive investment to support the build-out of the carrier's 4G LTE network. More recently, this carrier saw service outages spike, which resulted in negative press coverage and higher subscriber churn.
After conducting an extensive technical review to evaluate a range of solutions, this customer selected the InfiniStreamNG as its new monitoring platform due to its superior next-generation features, combined with the ability to support legacy workflows and the compelling total cost of ownership economics. We expect that this multi-year agreement will generate revenues in excess of $5 million per year. In addition to this deal, this customer recently expanded its relationship with Arbor for a major DDoS mitigation capacity expansion to help protect its network and improve its ability to offer a DDoS managed service to its customers. The frequency, complexity, and volume of DDoS attacks continues to rise, and our ability to keep pace is critical to both service providers and enterprises placing their continued trust in Arbor.
We recently announced plans to quadruple the mitigation capacity of the Arbor Cloud DDoS Managed Service to 8 terabits per second by the end of the calendar year. Having this roadmap in place was critical for one of Europe's largest online travel sites, who selected Arbor for both on-premise and cloud-based DDoS detection and mitigation. This same customer also purchased Arbor Spectrum, our network traffic analysis solution, to identify and investigate advanced threats. A key driver in this selection process was the planned integration between Spectrum and our ISNG platform, which we announced earlier this week. In the enterprise, Anil highlighted how our new vSTREAM and vSCOUT offerings provide enterprises with deeper application visibility, regardless of whether they run in the traditional data center or in the various forms of the cloud.
I'm pleased to report that we recently closed our first order for these new offerings, totaling nearly $1 million, with a long-standing customer in the energy sector. These products will be used to support a multi-phased company-wide IT initiative to achieve end-to-end visibility into the company's top 25 applications. While NetScout is the customer's de facto network tool, winning this project involved extensive testing to validate that our solution was more flexible and cost-effective than alternative APM tools, along with substantial collaboration with various application teams who helped further refine the development of key features and functionality. Thus far, we've been pleased with the market's response to all of our new software products for our enterprise solutions. We believe that these new capabilities position us to participate in projects with budgets that we historically could not tap into.
Our recently launched nGeniusPULSE product is a great example of this because it extends our nGeniusONE workflows to identify infrastructure performance issues with unprecedented speed, scale, and precision across today's largest, most complex technology infrastructures. As a result, customers can leverage their investment in our technology to track issues all the way from the service to a specific infrastructure element directly, rather than using disparate tools from multiple vendors. We are building a robust new sales pipeline for this offering, and I look forward to an upcoming call where we can highlight this use case. Regarding go-to-market activity, overall, we generated good momentum with our go-to-market activities during the past quarter. Our marketing organization did an excellent job in cost-effectively maximizing the impact of events such as the ENGAGE User Conference and Cisco Live, driving third-party validation of our technology leadership and producing favorable media coverage.
Our global sales force is moving forward with great enthusiasm about our newest product, along with the campaigns that we are implementing to generate, cultivate, and close new business with existing customers and prospects. In closing, we move forward intent on further strengthening and expanding our customers' relationships with a strong lineup of innovative new products. That concludes my prepared remarks at this point, I will turn the call over to Jean.
Thank you, Michael, and good morning, everyone. This morning, I will review key metrics for the first quarter of fiscal year 2018. After that, I will review the guidance for fiscal year 2018. As a reminder, this review will focus on our non-GAAP results, which are reconciled with our GAAP results in the appendix of the slide presentation. Slide number 12 shows our results for the first quarter of fiscal year 2018. For the quarter, total revenue decreased 18% to $228.8 million. Our gross margin of 75.9% increased by 300 basis points. The improvement in gross margin primarily reflects our progress with product strategy aimed at replacing legacy hardware-dependent offerings with our ASI technology. Our operating expenses were essentially flat as we continue to control headcount and selectively backfill attrition in certain areas while we tactically expand our sales force to capture the market opportunities.
We reported an operating profit margin of 6.3%. This translated into diluted earnings per share of $0.08. Turning to slide 13, I'd like to briefly review the revenue trends for the quarter. As we have discussed on prior calls, we are managing through a significant moderation in purchasing by one of our large tier 1 service provider customers as they manage their network evolutions. This moderation began in fiscal year 2017 as revenue from this customer declined by well over $100 million. We expect another substantial decline in this customer's purchasing in fiscal year 2018. Our revenue SKU for fiscal year 2018 reflects this purchasing pattern. Turning to the enterprise, this vertical decreased by 9%. The decline reflected the timing of certain large federal deals in the first quarter of last year that did not recur at the same level this past quarter, and softness within certain ancillary product lines.
With that said, we are pleased with the strength of our federal sales pipeline as we head into the second quarter. The composition of the first quarter's revenue reflected the decline in our service provider vertical, and the mix was 52% of total revenue coming from service provider and 48% from enterprise. In terms of revenue by geography, which is calculated on a GAAP basis, international represented 39% of total first quarter revenue versus 37% in last year's quarter. The decline in the United States was driven by the decrease in revenue from that large tier 1 carrier. Excluding that customer, we had mid-single digit growth across all other U.S. customers. We did not have a 10% customer this quarter. Slide 14 details our balance sheet highlights and free cash flow. We ended the quarter with cash equivalents, short-term marketable securities, and long-term marketable securities of $409.7 million.
Our revolver had $5 million of available credit under our existing facility, which leaves us with total liquidity of nearly $910 million. We experienced a very high conversion rate of free cash flow to non-GAAP net income this quarter, primarily due to working capital changes. Our free cash flow for the first quarter of fiscal year 2018 was $49.3 million. We still anticipate that our free cash flow for fiscal year 2018 will equate to approximately 100% of our non-GAAP net income. During the quarter, we used our free cash flow along with our cash balance to fund our share repurchase activity. In terms of our share repurchase activity, we repurchased 2,780,433 shares of our common stock at an average price of $35.97 per share, totaling approximately $100 million in the aggregate.
While this represented a negligible effect on the first quarter's earnings per share, it represents a $0.05 increase to our earnings per share outlook for the year. At present, we have approximately 4 million shares available for repurchase under our existing 20 million share repurchase authorization. As we head toward the completion of our current authorization, we are working with our board to update and finalize our financial policies going forward and determine the vehicles, timing, and funding for future share repurchases. We plan to be active in the market with our buyback program this quarter. To briefly recap other balance sheet highlights, accounts receivable net decreased by $108.5 million from the end of the last fiscal year. DSOs were 71 days, which is down from 80 days in the fourth fiscal quarter, but up modestly from 66 days in the first quarter of last year.
Moving to slide 15 for guidance, I will focus on the non-GAAP guidance and remind you that the reconciliation of our GAAP guidance to our non-GAAP guidance is in the appendix. Our guidance for fiscal year 2018 is fundamentally unchanged. We continue to expect that fiscal year 2018 revenue will be relatively unchanged from fiscal year 2017 levels. We anticipate that adoption of our next-generation real-time information platform will improve our gross margins in fiscal year 2018 and be the primary factor for a 200 basis point improvement in operating profitability over last year from 23% to 25%. Our net income outlook for fiscal year 2018 on a fundamental basis remains intact, reducing the average weighted diluted outstanding shares to approximately 91 million shares due to our repurchase activity through the first quarter provides us with an incremental $0.05 of earnings per share.
Accordingly, we are now targeting diluted EPS growth over last year on a percentage change basis that will range from the high single digits to the low double digits. We continue to expect that 40% of fiscal year 2018 revenue will be generated in the first half of the year, with the remaining 60% of revenue coming in the second half. Based on our first quarter revenue performance and our view into the phasing of fiscal year 2018 revenue, the mathematical implication for second quarter revenue is around $250 million. The anticipated year-over-year decline in second quarter revenue will be primarily driven by the purchasing pattern change at this 1 tier 1 service provider. We remain optimistic about the growth potential we see in the third and fourth quarters.
Other full year modeling assumptions are outlined on this slide based on the quarterly impact of these assumptions, most notably, relatively flat operating costs and roughly 90.6 million diluted shares outstanding. This would translate into second quarter diluted earnings per share in the range of $0.25-$0.28. That concludes my formal review of our financial results. Before we transition to Q&A, I will note that slide number 16 highlights the various investor conferences we plan to participate in over the next couple of months. That concludes our prepared remarks this morning. Thank you again for joining us, and we're now ready to answer questions. David, you may now begin the Q&A session.
Thank you. At this time, if you'd like to ask a question, please press the star and one on your touch-tone phone. If you wish to remove yourself from the question queue, you may do so by pressing the pound key. We do ask that in the interest of time, you limit yourself to one question and one follow-up. We'll take our first question from Mark Keller with D.A. Davidson. Please go ahead. Your line is open.
Great. Thanks for taking the question.
Sure.
Perhaps you could go into some more insight into the Tier 1 vendor that has moved off on their CapEx spending. Is that expected to continue? Is it a competitive situation? Is there market share loss? Is their move off of spending likely to translate to other carriers? Just some more insight into that Tier 1 carrier would be great.
I think we have talked about it, David, in the past about this tier 1 carrier, this is a development throughout the industry. It just happens to be more concentrated in terms of revenue in one. We have the notable impact. The software strategy was designed partly to reduce the impact of these kind of situation, which is trailing LTE spend in 4G and otherwise. Traffic growth with OTT, competitive plans, all-you-can-eat competitive plan is putting pressure on carriers to moderate their spending. That's what is happening. It's not because of competitive situation. In fact, we announced a $75 million deal some time ago with a carrier. We announced Vodafone exclusivity deal. We just announced the Asia Pacific deal, where our competitive situation has actually improved.
That required a lot of investment and integrating the assets from Danaher and Tektronix, then moving to aggressive to a software plan without necessarily compromising the top-line revenue. While the situation is happening with this provider, we have been able to make up most of it in other places. Just to recap that, not a competitive situation. It's not a product issue. It's just the timing and what's happening in the industry overall.
As a follow-up, should we expect that to re-accelerate as 5G comes and the timing of that?
Not because of 5G, but more because of OTT and video surfing. See, 5G is a technology which is not a complete refresh of the network. It only affects the last mile. 5G will indirectly impact expanding on 4G traffic because if the last mile has the potential of increasing the traffic on the network, on the core, which will put more pressure on the core, which will need to be expanded, then we will need more monitoring solutions. Being able to charge big prices, whether you're an infrastructure vendor or a monitoring vendor like us, is not going to be the same as before. We have been able to manage that by creating a more affordable solution for this increased traffic. 5G has an indirect impact on spending, but it's not directly is the reason for buying more of a solution.
Okay, thanks.
Yeah.
Thank you. We'll take our next question from Alex Kurtz with KeyBanc Capital Markets. Please go ahead. Your line is open.
Yeah, just a clarification then a question. On this Tier 1 carrier, Anil, is there a sense that there are projects maybe 24 months from now, 18 months from now, that will be software-based, that they're starting to initially discuss with you? Or is there just a broad-based holding pattern on any kind of discussion around investments in network performance management incrementally?
I think both, depending on the type of project. Obviously, they are looking at our software solution. There is no projects for software. I think software is a deployment mode once the value proposition is established. The value proposition is based on the, not only what we have to offer, but what kind of spending appetite they have. We are in the front of line everywhere, including this carrier. Only when they increase their spending for one reason or another, then our first in line position will deliver our revenue. We are not counting that to be any 10% customer, but we think we are going to be a make up for this in other areas as we have been doing for the last couple of years and moving forward.
Okay. Well, I appreciate that. Jean, can you just make the case for the There can be a lot of questions around this, but just make your case on why the second half it's going to play out as you'd expect. There's a lot of this revenue expectation already in backlog, more than historically you would have going in the second half. Just how would you explain it to folks that you're going to see this great ramp into the Q3 and Q4 periods here?
I would say it's probably three things, Alex, off the top of my head. First off, service providers separate from this one particular large tier 1 client still tend to buy heavier in the Q3 and Q4 quarters. As Anil had explained, we have a lot of strategic partnerships with existing service providers around the globe, and our new product set that allows us to consolidate other tools from vendors and go from the edge of the RAN through the data center up to the cloud resonates very well with them. That same story in other customers.
In the enterprise, with the products that we had talked about earlier related to cloud and APM, further going into the APM segment of our addressable market, as well as going into IPM, combined with our long-term relationships, resonates very well with them also as they look to be as efficient as possible in their operating costs and standardize where possible on one particular vendor. Finally, I think as Michael had said in his comments and when I talked to the sales force, they're very excited about the opportunities to expand their relationships within the customers and to give new products to their existing install base. The pipeline that we monitor is probably at the highest it's been in the last 12 months and has grown in the double-digit range at this point.
At this point, sitting here today, we still feel confident that we will achieve our $1.2 billion revenue, which is our revenue guidance.
Thank you.
We'll take our next question from Chad Bennett with Craig-Hallum. Your line is open. Please go ahead. Mr. Bennett, you may need to check the mute function on your phone. Your line is open.
Sorry. Great. Thanks for taking my questions this morning. Jean, maybe a quick question for you. On your business development expense that you guys on a non-GAAP basis back out of the income there. It was up pretty decently sequentially. I think it was about $5.5 million from roughly $3 million last quarter. I guess I was under the impression that expense would trend down. Can you address that? Also remind us why we backed this out of non-GAAP and whether or not it's a cash expense.
Sure. The first thing is, thank you for bringing that to the attention on the call, business development actually has ratcheted down. There's a one-time item in there of about, I'm going to say about $4 million, which relates to conforming vacation policies across the organization. It is a hit in Q1, but it actually will reverse in Q3. That's why we took it out of non-GAAP stat. Non-GAAP expenses generally relate to incremental expenses due to the large acquisition and relate to things like professional fees associated with infrastructure projects, facilities, those types of things that are not recurring in nature, distort the run rate of the actual business. However, most of them are cash expenses, they do flow through our free cash flow.
Got it. Second question for me. Again, probably focused on Jean. Just in the September quarter guide, I think you talked about it's obviously a fairly big federal quarter for everybody. You talked about, I think, confidence in the pipeline there. Do you have visibility into the fed demand for this quarter at this point, or is that just historical norm, September month, fiscal year-end demand that you just expect to happen?
Well, it's two parts. We already have a group of projects that we know are funded, and so clearly that goes into our forecast. We have a large, very high demand in the federal government for unfunded projects. We look at that on a historical basis and where the projects are in talking to the salespeople and estimate how much of the unfunded project demand that we have in the pipeline will come in.
Okay. Thanks for taking my questions.
Thank you.
We'll take our next question from Matt Hedberg with RBC Capital Markets. Please go ahead. Your line is open.
Hey, guys. Good morning. Thanks for taking my questions. Jean, maybe to put a finer point on the tier 1 contributions, can you help us think through roughly how much maybe your top two or three tier 1 customers spent a few years ago versus fiscal 2018? Maybe just trying to get a sense for the bottoming effect of that spending cycle.
Sure. The 2 top tier 1 customers, when you think about their coverage in the U.S. and their race for subscribers, they probably spent in a year where they were actually deploying and optimizing their 4G LTE network, a magnitude of about 10 times larger than any of the other tier 1s. In FY 2014 over FY 2015, we saw about a similar decline in the other tier 1, which was about $100 million decline on a year-over-year basis. That particular customer has leveled off. They now spend, I would say, maybe 2 times on average what the other tier 1s or other carriers do around the globe. However, that particular customer, to echo something that Anil had said about the projects that we have and the value that we add, that particular customer has grown anywhere from the mid to low double digits over the last couple of quarters.
That type of pattern is what we're seeing with the other large tier 1. We expect that similar, they will reach a level where they're probably maybe 2 times more than other tier 1 carriers, or other international carriers will probably equate to their largest tier 1 competitor. We expect that they will still continue to decline this year by about another $100 million. As Anil had mentioned, we have a long-term relationship with them. We have many projects. It's mostly just focused on their economic condition today and where their network evolution is, and it's not a result of market share or any kind of competitive issues.
I think maybe just to add to that, because your real question was about how much of it is bottom out. If you look at three or four top carriers, tier 1 carriers, one of them was NetScout customer, and two of them were Tektronix. The NetScout one bottomed out about three years ago, then we had a big spend we announced earlier last year about renewing our incumbency, and that was the big deal we had announced without the name. The second one had bottomed out last year, and we see a slight increase in that this year. Third one is in the process of bottoming out this year, which is what Jean is talking about. That's basically the situation on the top tier 1 carriers.
Super helpful, Anil. Jean, maybe a quick one. Maybe I missed this, but I was wondering if you could help clarify what % of product revenue would be software this year. Thank you.
I believe we said that we anticipate that software revenue as a % of product revenue will get close to around 10%.
Okay, pretty consistent with what you were saying last quarter.
Yes.
Okay. Thank you.
We'll take our next question from Eric Martinuzzi with Lake Street Capital Markets. Your line is open. Please go ahead.
Thanks. I want to set the carriers aside for this question. The assumption on the rest of the revenue stream talks about sort of durability of the enterprise, their continued strength, also on the services side. Should we expect kind of a normal seasonal trend, strong federal in September, strong enterprise through calendar year-end? Is that what the guidance implies? Also on the services side, one of the things that I get concerned about with the dramatic product decline is that we see a ripple effect in the services in future quarters. What should we be thinking about there?
I'll take the service revenue first. I think we believe that service revenue in total on a year-over-year basis should be relatively flat to maybe slightly up at about 1%. As we've talked about in the past, it's mostly the effect of some large customers. When I say that, I want to say in the range of five to maybe 10, who have very large installed base, who negotiate contracts with us on operating expense for their service. It doesn't really affect our margin because, if you think about fixed cost contributions and variable, they're still very profitable. On the enterprise, we still feel that we believe, given the pipeline that I talked about earlier, that we should have a strong federal quarter. Hopefully, most of that is focused in the DoD and some civilian.
We're looking to the government to see their spending and how they will do in the budget. We do anticipate that enterprise should continue to be a contributor to revenue and stronger in the third and fourth quarters.
I just want to mention, Eric, just a couple of other aspects, that for a given customer, product revenue is not declining. The ASP is declining with the software. ASP declining doesn't necessarily mean that total deal size is declining. Because people can use our product on a wider scale for a smaller price because of the software model and service provider, it actually makes our service revenue, and that because of our backward compatibility with legacy product, much stronger. Yes, you're right that there is impact on both product and service revenue, but these dynamics are playing, which are actually positive.
Understand. Thank you. One more question, if I could, on the repurchase program. Obviously, you guys were very active in Q1. I was looking at last quarter's press release, it looks like in all of FY 2017, you bought $80 million worth of stock, then in Q1 here, you bought $100 million worth of stock. Would you care to comment on the trend there?
Sure. We always plan on being active in the market. It's one of our capital structure efficiency goals, we generally use a Rule 10b5-1 plan and an open market repurchase. As you know through the RMT rules, that's what we were restricted basically to for that two-year period. When we put in the grid, you have to put it in at the beginning of a quarter when your open window opens. In Q3 and Q4, while we intended to be in there, the grid that we set the prices at which levels to buy, the stock fortunately ran up in Q3, then it also fortunately ran up in Q4. It just more exceeded the grids that we had originally thought would be in place for the market price for our shares during that time period.
In Q1 of this year, as we continue to deploy our capital, the grid was more in line with where the shares actually performed.
Understand. Thank you.
We'll take our next question from Kevin Liu with B. Riley & Company. Please go ahead. Your line is open.
Hi, good morning. Just a quick follow-on to that share repurchase question. I guess given that most of the $100 million in repurchases were done at a higher average price, are you saying that you're comfortable continuing to buy back at about $100 million per quarter, so long as you have the capacity?
Yeah. We constantly look at our operating plans and our strategy and what we think the long-term share price will be and look at how that is reflected in the current quarter's share price and make a determination on what we think we will be purchasing during that quarter. We obviously were very comfortable with $100 million last quarter. We anticipate that we will be active again in the market. It obviously depends on where the share price goes throughout the rest of this quarter.
Got it. Just switching gears a bit to some of the new product introductions, particularly on the cloud management side. Curious for that first deal that you guys closed, what was the sales cycle length that you saw there? Then who were some of the folks that you were competing against in order to secure that deal?
Yeah, I would say the sales cycle was about six months, six to eight months. The competition was against one of the most prominent APM vendors in the space. There was a head-to-head competition for the same kind of deployment in the same servers and same data center environment. It was a very instructive and rewarding experience.
One thing I want to add, Kevin, is that this was an existing customer on the network side for us. The excitement about this was that it's not that we were competing with somebody else. We were actually getting into somebody else's space and creating competition for them and won. This looks like a good win for us in the application area, which is a good leading indicator of what's going to happen in the cloud. We have the only solution in the market which works on-prem and in cloud. That was one of the reasons. When they move the application to cloud, if and when they do that, they don't have to change any of their procedures, processes, and use of our tool. That's going to, I think, resonate.
That's one of the things we are excited about, that vSCOUT and vSTREAM is not just a cloud product. It allows us to go deeper into the data server farms and be a player in a new market, which was not easily accessible to us in the past.
Got it. I appreciate the color.
Thank you.
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Super. Well, thank you very much, David, for your help today. Thank you to all of our analysts and shareholders and prospective shareholders for tuning in this morning. If you do have questions, certainly feel free to get a hold of investor relations here at NetScout. We look forward to seeing you on the road at various investor conferences when that occurs, and talking with you about our Q2 results this fall. Thank you very much.
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