REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Jan. 28, 2023	Jan. 29, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,056,521	$ 844,443
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	887,240	673,593
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	169,281	170,850
Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	735,634	540,936
Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	119,505	85,710
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	73,445	72,917
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	15,405	21,110
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	67,891	72,491
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	34,575	40,370
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	10,066	10,909
Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	855,139	626,646
Networking Platforms \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	855,139	626,646
Networking Platforms \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	735,634	540,936
Networking Platforms \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	119,505	85,710
Networking Platforms \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	73,445	72,917
Platform Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	18,864	29,682
Platform Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	54,581	43,235
Platform Software and Services \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	73,445	72,917
Platform Software and Services \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	15,405	21,110
Blue Planet Automation Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	3,982	8,774
Blue Planet Automation Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	11,423	12,336
Blue Planet Automation Software and Services \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	15,405	21,110
Blue Planet Automation Software and Services \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services
Disaggregation of Revenue [Line Items]
Total revenue	112,532	123,770
Global Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	9,255	8,491
Global Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	103,277	115,279
Global Services \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	67,891	72,491
Global Services \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	34,575	40,370
Global Services \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	$ 10,066	$ 10,909