at that time , we believed that some portion of these orders likely reflected short-term purchasing behaviors based on customer-specific considerations in the face of the pandemic , including : customer concerns about future continued availability of supply ; implementation of customer business continuity actions ; our enhanced efforts to obtain increased visibility into expected demand ; customer consumption of their existing inventory or spare equipment ; additional network capacity requirements ; acceleration of capital spending ; and , possibly , increased bandwidth demands being placed on networks due to the pandemic . during the third and fourth quarters of fiscal 2020 , our order volumes declined significantly from the level achieved in the second quarter of fiscal 2020 , particularly among our communications service provider customers and cable operator customers . we believe that this greater capital expenditure restraint stems from the deferral or re-prioritization of certain new network initiatives and continued uncertainty associated with the impact of the pandemic and economic uncertainty upon their enterprise business segments . as a result , our order volumes were meaningfully below revenue during the second half of fiscal 2020 , challenging our visibility and the outlook for orders and revenue in future 47 periods . we expect this more cautious spending environment to continue into fiscal 2021 and expect these conditions to continue to adversely affect our order volumes and revenue in the short term . over the longer term , we continue to believe that the unique and increased demands placed on network infrastructures as a result of the covid-19 pandemic , and the related increase in remote working worldwide , have accelerated certain trends , including cloud network adoption , networking resilience and flexibility , and enhanced network automation . we believe that we are well positioned competitively to capitalize on the longer-term opportunities that we expect to be presented by these dynamics . supply chain . during the second quarter of fiscal 2020 , some of our component suppliers – particularly those with facilities in china and malaysia – experienced challenges related to covid-19 that resulted in temporary closures or reductions of supply capacity . although in many cases we were able to overcome these conditions through execution of our mitigation planning , supply chain disruptions negatively impacted our revenue for the second quarter of fiscal 2020. during the second half of fiscal 2020 , we took a number of steps , some of which remain ongoing , including multi-sourcing and pre-ordering components and finished goods inventory , in an effort to reduce the impact of the adverse supply chain conditions that we experienced . as a result of these actions , and generally improved conditions with our suppliers or the geographies in which they operate , supply chain related challenges to our operations abated in the third and fourth quarters of fiscal 2020 and were not material to revenue . however , there can be no assurance that supply chain disruptions related to covid-19 will not continue , or worsen , in the future . services and customer fulfillment . we have experienced some disruption in our ability to provide installation , professional and fulfillment services to customers due to site access limitations , limited customer availability , project delays or re-prioritization by customers , and travel bans or restrictions on movement or gatherings . these conditions , which adversely impacted revenue in the second quarter of fiscal 2020 , have also adversely impacted the timing of customer plans for newer network projects and our ability to operationalize recent customer design wins , primarily in international markets . we expect these conditions to persist in the short-term and , as a result , to continue to adversely impact our revenue and results of operations . we continue to take steps and work with customers to ensure their business needs are supported , while protecting the health and safety of our employees , customers and business partners . however , should restrictions or disruptions persist or worsen , including any reduced availability of air transport , port closures , or increased border controls or closures , our business , operations and ability to meet customer demand could be materially adversely affected . sales & marketing . the competitive nature of our business depends on our ability to conduct sales and marketing activities with our customers . for instance , in the past few years , our ability to be first to market with leading networking solutions , and to conduct sales and marketing activities around these new technology offerings , has had a significant impact on our revenue and growth . in the first half of fiscal 2020 , we were the first to market with 800 gigabit technology with our fifth-generation wavelogic® coherent modem technology . restrictions on travel due to covid-19 and limitations on interactions with customers , such as field and lab trials , have negatively impacted our ability to carry out certain sales and marketing activities , including our ability to secure new customers , to qualify and sell new products , and to grow sales with customers . this is particularly the case where we do not have longer-standing supply relationships , such as within international markets and for our blue planet automation software and services segment and our packet networking product line . we believe customers are exercising greater restraint in networking projects , including data centers , and are also more carefully prioritizing where and when to add network capacity . delays in operationalizing new network projects that we anticipated occurring on their original timelines adversely affected our revenue during fiscal 2020. conversely , our recent gross margin performance has benefited from these dynamics , with a larger percentage of our revenue comprised of existing business , as compared to new design wins and early in life projects , which tend to have lower margins . market growth & conditions . story_separator_special_tag emea revenue increased , primarily reflecting sales increases of $ 20.4 million within our networking platforms segment , $ 5.2 million within our platform software and services segment and $ 3.4 million within our blue planet automation software and services segment , partially offset by a sales decrease of $ 4.2 million within our global services segment . our networking platforms segment revenue increase reflects a product line sales increase of $ 15.8 million of converged packet optical products , primarily related to sales increases of $ 8.4 million of our 6500 packet-optical platform to communications service providers and web-scale providers and $ 6.5 million of our 5400 family packet-optical platforms to communications service providers . apac revenue decreased , primarily reflecting sales decreases of $ 35.6 million within our networking platforms segment and $ 9.0 million of our global services segment . these sales decreases were partially offset by sales increases of $ 8.0 million within our blue planet automation software and services segment and $ 6.4 million within our platform software and services segment . our networking platforms segment revenue decrease primarily reflects a decrease of $ 56.5 million in sales of our 6500 packet-optical platform to communications service providers in japan and india , partially offset by an increase of $ 16.7 million in sales of our waveserver products primarily to web-scale providers . in fiscal 2020 and fiscal 2019 , our top ten customers contributed 54.5 % and 59.3 % of our revenue , respectively . consequently , our financial results are closely correlated with the spending of a relatively small number of customers and can be significantly affected by market , industry or competitive dynamics affecting the businesses of those customers . our reliance on a relatively small number of customers increases our exposure to changes in their spending levels , network priorities and purchasing strategies . the loss of a significant customer could have a material adverse effect on our business and results of operations , and our results of operations can fluctuate quarterly depending on sales volumes and purchasing priorities with these large customers . sales to at & t were $ 373.2 million , or 10.6 % of total revenue , in fiscal 2020 , and $ 388.7 million , or 10.9 % of total revenue , in fiscal 2019. verizon accounted for $ 459.8 million , or 12.9 % of total revenue , in fiscal 2019. sales to one of our web-scale customers was $ 370.6 million , or 10.4 % of total revenue , in fiscal 2019. no other customer accounted for 52 greater than 10 % of our revenue in fiscal 2020 or fiscal 2019. the identity of and percentage of revenue attributable to our largest customers has varied from period to period . for example , the web-scale provider noted above contributed greater than 10 % of our revenue for the first time in fiscal 2019. while drivers of bandwidth growth and network evolution remain strong , many of our network operator customers are under pressure to constrain their capital expenditure budgets , and their businesses can not grow their network spending at the rate of bandwidth growth . as a result , as we innovate and introduce new and more robust solutions that increase capacity or features , there is a market expectation of solutions that are more cost-effective from a price for performance perspective than existing or competing solutions . the combination of this regular technology-driven price compression , price competition in our markets and ongoing customer efforts to manage network costs can impact our growth rates and requires that we increase our volume of product shipments to maintain and grow revenue . cost of goods sold and gross profit product cost of goods sold consists primarily of amounts paid to third-party contract manufacturers , component costs , employee-related costs and overhead , shipping and logistics costs associated with manufacturing-related operations , warranty and other contractual obligations , royalties , license fees , amortization of intangible assets , cost of excess and obsolete inventory and , when applicable , estimated losses on committed customer contracts . services cost of goods sold consists primarily of direct and third-party costs associated with our provision of services including installation , deployment , maintenance support , consulting and training activities , and , when applicable , estimated losses on committed customer contracts . the majority of these costs relate to personnel , including employee and third-party contractor-related costs . our gross profit as a percentage of revenue , or “ gross margin , ” can fluctuate due to a number of factors , particularly when viewed on a quarterly basis . our gross margin can fluctuate and be adversely impacted depending on our revenue concentration within a particular segment , product line , geography , or customer , including our success in selling software in a particular period . our gross margin remains highly dependent on our continued ability to drive product cost reductions relative to the price erosion that we regularly encounter in our markets . moreover , we are often required to compete with aggressive pricing and commercial terms , and , to secure business with new and existing customers , we may agree to pricing or other unfavorable commercial terms that adversely affect our gross margin . success in taking share and winning new business can result in additional pressure on gross margin from these pricing dynamics and the early stages of these network deployments . early stages of new network builds also often include an increased concentration of lower margin “ common ” equipment , photonics sales and installation services , with the intent to improve margin as we sell channel cards and maintenance services to customers adding capacity or services to their networks . gross margin can be impacted by technology-based price compression and the introduction or substitution of new platforms with improved price for performance as compared to existing solutions that carry higher margins

cash used in accounts receivable $ ( 17,299 ) cash used in inventories ( 25,044 ) cash used in prepaid expenses and other ( 38,998 ) cash used in accounts payable , accruals and other obligations ( 117,931 ) cash provided by deferred revenue 2,519 cash used in operating lease assets and liabilities , net ( 3,109 ) total cash used for working capital $ ( 199,862 ) as compared to the end of fiscal 2019 : the $ 17.3 million of cash used in accounts receivable during fiscal 2020 reflects increased sales volume at the end of the fourth quarter of fiscal 2020 ; 58 the $ 25.0 million of cash used in inventory during fiscal 2020 primarily reflects increases in finished goods to meet customer delivery schedules related to some of the actions that we took during the last three quarters of fiscal 2020 to mitigate the risk of adverse supply chain impact on our business and operations due to covid-19 related disruptions ; the $ 39.0 million of cash used in prepaid expenses and other during fiscal 2020 primarily reflects increases in upfront future discounts paid to customers ; the $ 117.9 million of cash used in accounts payable , accruals and other obligations during fiscal 2020 primarily reflects lower employee bonus accrual associated with our annual cash incentive compensation plan and increased payments for inventory purchases ; the $ 2.5 million of cash provided by deferred revenue during fiscal 2020 represents an increase in advanced payments received from customers prior to revenue recognition ; and the $ 3.1 million of cash used in operating lease assets and liabilities , net , during fiscal 2020 represents cash paid for operating leases . for more details , see note 17 to our consolidated financial statements included in item 8 of part ii of this report . our days sales outstanding ( “ dsos ” ) were 82 for both fiscal 2020 and fiscal 2019. our inventory turns decreased from 5.0 turns during fiscal 2019 to 4.6 turns during fiscal 2020 due to the increase in inventory .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```cash used in accounts receivable $ ( 17,299 ) cash used in inventories ( 25,044 ) cash used in prepaid expenses and other ( 38,998 ) cash used in accounts payable , accruals and other obligations ( 117,931 ) cash provided by deferred revenue 2,519 cash used in operating lease assets and liabilities , net ( 3,109 ) total cash used for working capital $ ( 199,862 ) as compared to the end of fiscal 2019 : the $ 17.3 million of cash used in accounts receivable during fiscal 2020 reflects increased sales volume at the end of the fourth quarter of fiscal 2020 ; 58 the $ 25.0 million of cash used in inventory during fiscal 2020 primarily reflects increases in finished goods to meet customer delivery schedules related to some of the actions that we took during the last three quarters of fiscal 2020 to mitigate the risk of adverse supply chain impact on our business and operations due to covid-19 related disruptions ; the $ 39.0 million of cash used in prepaid expenses and other during fiscal 2020 primarily reflects increases in upfront future discounts paid to customers ; the $ 117.9 million of cash used in accounts payable , accruals and other obligations during fiscal 2020 primarily reflects lower employee bonus accrual associated with our annual cash incentive compensation plan and increased payments for inventory purchases ; the $ 2.5 million of cash provided by deferred revenue during fiscal 2020 represents an increase in advanced payments received from customers prior to revenue recognition ; and the $ 3.1 million of cash used in operating lease assets and liabilities , net , during fiscal 2020 represents cash paid for operating leases . for more details , see note 17 to our consolidated financial statements included in item 8 of part ii of this report . our days sales outstanding ( “ dsos ” ) were 82 for both fiscal 2020 and fiscal 2019. our inventory turns decreased from 5.0 turns during fiscal 2019 to 4.6 turns during fiscal 2020 due to the increase in inventory .
```    
 Suspicious Activity Report : at that time , we believed that some portion of these orders likely reflected short-term purchasing behaviors based on customer-specific considerations in the face of the pandemic , including : customer concerns about future continued availability of supply ; implementation of customer business continuity actions ; our enhanced efforts to obtain increased visibility into expected demand ; customer consumption of their existing inventory or spare equipment ; additional network capacity requirements ; acceleration of capital spending ; and , possibly , increased bandwidth demands being placed on networks due to the pandemic . during the third and fourth quarters of fiscal 2020 , our order volumes declined significantly from the level achieved in the second quarter of fiscal 2020 , particularly among our communications service provider customers and cable operator customers . we believe that this greater capital expenditure restraint stems from the deferral or re-prioritization of certain new network initiatives and continued uncertainty associated with the impact of the pandemic and economic uncertainty upon their enterprise business segments . as a result , our order volumes were meaningfully below revenue during the second half of fiscal 2020 , challenging our visibility and the outlook for orders and revenue in future 47 periods . we expect this more cautious spending environment to continue into fiscal 2021 and expect these conditions to continue to adversely affect our order volumes and revenue in the short term . over the longer term , we continue to believe that the unique and increased demands placed on network infrastructures as a result of the covid-19 pandemic , and the related increase in remote working worldwide , have accelerated certain trends , including cloud network adoption , networking resilience and flexibility , and enhanced network automation . we believe that we are well positioned competitively to capitalize on the longer-term opportunities that we expect to be presented by these dynamics . supply chain . during the second quarter of fiscal 2020 , some of our component suppliers – particularly those with facilities in china and malaysia – experienced challenges related to covid-19 that resulted in temporary closures or reductions of supply capacity . although in many cases we were able to overcome these conditions through execution of our mitigation planning , supply chain disruptions negatively impacted our revenue for the second quarter of fiscal 2020. during the second half of fiscal 2020 , we took a number of steps , some of which remain ongoing , including multi-sourcing and pre-ordering components and finished goods inventory , in an effort to reduce the impact of the adverse supply chain conditions that we experienced . as a result of these actions , and generally improved conditions with our suppliers or the geographies in which they operate , supply chain related challenges to our operations abated in the third and fourth quarters of fiscal 2020 and were not material to revenue . however , there can be no assurance that supply chain disruptions related to covid-19 will not continue , or worsen , in the future . services and customer fulfillment . we have experienced some disruption in our ability to provide installation , professional and fulfillment services to customers due to site access limitations , limited customer availability , project delays or re-prioritization by customers , and travel bans or restrictions on movement or gatherings . these conditions , which adversely impacted revenue in the second quarter of fiscal 2020 , have also adversely impacted the timing of customer plans for newer network projects and our ability to operationalize recent customer design wins , primarily in international markets . we expect these conditions to persist in the short-term and , as a result , to continue to adversely impact our revenue and results of operations . we continue to take steps and work with customers to ensure their business needs are supported , while protecting the health and safety of our employees , customers and business partners . however , should restrictions or disruptions persist or worsen , including any reduced availability of air transport , port closures , or increased border controls or closures , our business , operations and ability to meet customer demand could be materially adversely affected . sales & marketing . the competitive nature of our business depends on our ability to conduct sales and marketing activities with our customers . for instance , in the past few years , our ability to be first to market with leading networking solutions , and to conduct sales and marketing activities around these new technology offerings , has had a significant impact on our revenue and growth . in the first half of fiscal 2020 , we were the first to market with 800 gigabit technology with our fifth-generation wavelogic® coherent modem technology . restrictions on travel due to covid-19 and limitations on interactions with customers , such as field and lab trials , have negatively impacted our ability to carry out certain sales and marketing activities , including our ability to secure new customers , to qualify and sell new products , and to grow sales with customers . this is particularly the case where we do not have longer-standing supply relationships , such as within international markets and for our blue planet automation software and services segment and our packet networking product line . we believe customers are exercising greater restraint in networking projects , including data centers , and are also more carefully prioritizing where and when to add network capacity . delays in operationalizing new network projects that we anticipated occurring on their original timelines adversely affected our revenue during fiscal 2020. conversely , our recent gross margin performance has benefited from these dynamics , with a larger percentage of our revenue comprised of existing business , as compared to new design wins and early in life projects , which tend to have lower margins . market growth & conditions . story_separator_special_tag emea revenue increased , primarily reflecting sales increases of $ 20.4 million within our networking platforms segment , $ 5.2 million within our platform software and services segment and $ 3.4 million within our blue planet automation software and services segment , partially offset by a sales decrease of $ 4.2 million within our global services segment . our networking platforms segment revenue increase reflects a product line sales increase of $ 15.8 million of converged packet optical products , primarily related to sales increases of $ 8.4 million of our 6500 packet-optical platform to communications service providers and web-scale providers and $ 6.5 million of our 5400 family packet-optical platforms to communications service providers . apac revenue decreased , primarily reflecting sales decreases of $ 35.6 million within our networking platforms segment and $ 9.0 million of our global services segment . these sales decreases were partially offset by sales increases of $ 8.0 million within our blue planet automation software and services segment and $ 6.4 million within our platform software and services segment . our networking platforms segment revenue decrease primarily reflects a decrease of $ 56.5 million in sales of our 6500 packet-optical platform to communications service providers in japan and india , partially offset by an increase of $ 16.7 million in sales of our waveserver products primarily to web-scale providers . in fiscal 2020 and fiscal 2019 , our top ten customers contributed 54.5 % and 59.3 % of our revenue , respectively . consequently , our financial results are closely correlated with the spending of a relatively small number of customers and can be significantly affected by market , industry or competitive dynamics affecting the businesses of those customers . our reliance on a relatively small number of customers increases our exposure to changes in their spending levels , network priorities and purchasing strategies . the loss of a significant customer could have a material adverse effect on our business and results of operations , and our results of operations can fluctuate quarterly depending on sales volumes and purchasing priorities with these large customers . sales to at & t were $ 373.2 million , or 10.6 % of total revenue , in fiscal 2020 , and $ 388.7 million , or 10.9 % of total revenue , in fiscal 2019. verizon accounted for $ 459.8 million , or 12.9 % of total revenue , in fiscal 2019. sales to one of our web-scale customers was $ 370.6 million , or 10.4 % of total revenue , in fiscal 2019. no other customer accounted for 52 greater than 10 % of our revenue in fiscal 2020 or fiscal 2019. the identity of and percentage of revenue attributable to our largest customers has varied from period to period . for example , the web-scale provider noted above contributed greater than 10 % of our revenue for the first time in fiscal 2019. while drivers of bandwidth growth and network evolution remain strong , many of our network operator customers are under pressure to constrain their capital expenditure budgets , and their businesses can not grow their network spending at the rate of bandwidth growth . as a result , as we innovate and introduce new and more robust solutions that increase capacity or features , there is a market expectation of solutions that are more cost-effective from a price for performance perspective than existing or competing solutions . the combination of this regular technology-driven price compression , price competition in our markets and ongoing customer efforts to manage network costs can impact our growth rates and requires that we increase our volume of product shipments to maintain and grow revenue . cost of goods sold and gross profit product cost of goods sold consists primarily of amounts paid to third-party contract manufacturers , component costs , employee-related costs and overhead , shipping and logistics costs associated with manufacturing-related operations , warranty and other contractual obligations , royalties , license fees , amortization of intangible assets , cost of excess and obsolete inventory and , when applicable , estimated losses on committed customer contracts . services cost of goods sold consists primarily of direct and third-party costs associated with our provision of services including installation , deployment , maintenance support , consulting and training activities , and , when applicable , estimated losses on committed customer contracts . the majority of these costs relate to personnel , including employee and third-party contractor-related costs . our gross profit as a percentage of revenue , or “ gross margin , ” can fluctuate due to a number of factors , particularly when viewed on a quarterly basis . our gross margin can fluctuate and be adversely impacted depending on our revenue concentration within a particular segment , product line , geography , or customer , including our success in selling software in a particular period . our gross margin remains highly dependent on our continued ability to drive product cost reductions relative to the price erosion that we regularly encounter in our markets . moreover , we are often required to compete with aggressive pricing and commercial terms , and , to secure business with new and existing customers , we may agree to pricing or other unfavorable commercial terms that adversely affect our gross margin . success in taking share and winning new business can result in additional pressure on gross margin from these pricing dynamics and the early stages of these network deployments . early stages of new network builds also often include an increased concentration of lower margin “ common ” equipment , photonics sales and installation services , with the intent to improve margin as we sell channel cards and maintenance services to customers adding capacity or services to their networks . gross margin can be impacted by technology-based price compression and the introduction or substitution of new platforms with improved price for performance as compared to existing solutions that carry higher margins

