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Operating Segments and Geographic Information - Information on Reportable Segments (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 02, 2021 USD ($) | Dec. 28, 2019 USD ($) | Jan. 02, 2021 USD ($) segment | Dec. 28, 2019 USD ($)
Information on reportable segments |  |  |  |
Number of broad business categories (in segment) | segment |  |  | 2 |
Total net revenue | $ 299.9 | $ 313.7 | $ 584.6 | $ 613.5
Gross profit | $ 180.1 | $ 189.5 | $ 349.5 | $ 363.9
Gross margin (as a percent) | 60.10% | 60.40% | 59.80% | 59.30%
Operating income | $ 42.3 | $ 45.0 | $ 73.6 | $ 65.7
Operating margin (as a percent) | 14.10% | 14.30% | 12.60% | 10.70%
Other Items |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0
Gross profit | (9.2) | (9.7) | (18.6) | (19.2)
Operating income | (24.5) | (22.9) | (53.8) | (54.9)
Network and Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 206.7 | 234.2 | 390.2 | 454.0
Gross profit | $ 130.9 | $ 155.6 | $ 248.7 | $ 296.2
Gross margin (as a percent) | 63.30% | 66.40% | 63.70% | 65.20%
Operating income | $ 22.2 | $ 37.5 | $ 35.5 | $ 59.8
Operating margin (as a percent) | 10.70% | 16.00% | 9.10% | 13.20%
Network and Service Enablement | Network Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 180.9 | $ 203.0 | $ 343.0 | $ 401.9
Gross profit | $ 113.3 | $ 134.8 | $ 216.8 | $ 262.8
Gross margin (as a percent) | 62.60% | 66.40% | 63.20% | 65.40%
Network and Service Enablement | Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 25.8 | $ 31.2 | $ 47.2 | $ 52.1
Gross profit | $ 17.6 | $ 20.8 | $ 31.9 | $ 33.4
Gross margin (as a percent) | 68.20% | 66.70% | 67.60% | 64.10%
Optical Security and Performance Products | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 93.2 | $ 79.5 | $ 194.4 | $ 159.5
Gross profit | $ 58.4 | $ 43.6 | $ 119.4 | $ 86.9
Gross margin (as a percent) | 62.70% | 54.80% | 61.40% | 54.50%
Operating income | $ 44.6 | $ 30.4 | $ 91.9 | $ 60.8
Operating margin (as a percent) | 47.90% | 38.20% | 47.30% | 38.10%
Product revenue |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 262.1 | $ 281.9 | $ 510.0 | $ 546.7
Product revenue | Other Items |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 0.0 | 0.0 | 0.0 | 0.0
Product revenue | Network and Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 169.3 | 202.5 | 316.2 | 387.5
Product revenue | Network and Service Enablement | Network Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 156.4 | 183.9 | 295.6 | 361.2
Product revenue | Network and Service Enablement | Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 12.9 | 18.6 | 20.6 | 26.3
Product revenue | Optical Security and Performance Products | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 92.8 | 79.4 | 193.8 | 159.2
Service revenue |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 37.8 | 31.8 | 74.6 | 66.8
Service revenue | Other Items |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 0.0 | 0.0 | 0.0 | 0.0
Service revenue | Network and Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 37.4 | 31.7 | 74.0 | 66.5
Service revenue | Network and Service Enablement | Network Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 24.5 | 19.1 | 47.4 | 40.7
Service revenue | Network and Service Enablement | Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 12.9 | 12.6 | 26.6 | 25.8
Service revenue | Optical Security and Performance Products | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 0.4 | $ 0.1 | $ 0.6 | $ 0.3

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