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Revenue (Tables)
 6 Months Ended
May 01, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue The tables below set forth Ciena’s disaggregated revenue for the respective periods (in thousands):
Quarter Ended May 1, 2021
Networking PlatformsPlatform Software and ServicesBlue Planet Automation Software and ServicesGlobal ServicesTotal
Product lines:
Converged Packet Optical
$573,657 $— $— $— $573,657 
Routing and Switching63,628 — — — 63,628 
Platform Software and Services
— 56,688 — — 56,688 
Blue Planet Automation Software and Services
— — 23,958 — 23,958 
Maintenance Support and Training
— — — 70,418 70,418 
Installation and Deployment
— — — 37,999 37,999 
Consulting and Network Design
— — — 7,579 7,579 
Total revenue by product line
$637,285 $56,688 $23,958 $115,996 $833,927 
Timing of revenue recognition:
Products and services at a point in time
$637,285 $20,765 $10,765 $1,411 $670,226 
Services transferred over time
— 35,923 13,193 114,585 163,701 
Total revenue by timing of revenue recognition
$637,285 $56,688 $23,958 $115,996 $833,927 

Quarter Ended May 2, 2020
Networking PlatformsPlatform Software and ServicesBlue Planet Automation Software and ServicesGlobal ServicesTotal
Product lines:
Converged Packet Optical
$654,294 $— $— $— $654,294 
Routing and Switching64,167 — — — 64,167 
Platform Software and Services
— 44,985 — — 44,985 
Blue Planet Automation Software and Services
— — 15,017 — 15,017 
Maintenance Support and Training
— — — 71,479 71,479 
Installation and Deployment
— — — 34,242 34,242 
Consulting and Network Design
— — — 9,869 9,869 
Total revenue by product line
$718,461 $44,985 $15,017 $115,590 $894,053 
Timing of revenue recognition:
Products and services at a point in time
$718,461 $16,978 $4,745 $4,677 $744,861 
Services transferred over time
— 28,007 10,272 110,913 149,192 
Total revenue by timing of revenue recognition
$718,461 $44,985 $15,017 $115,590 $894,053 
Six Months Ended May 1, 2021
Networking PlatformsPlatform Software and ServicesBlue Planet Automation Software and ServicesGlobal ServicesTotal
Product lines:
Converged Packet Optical
$1,085,981 $— $— $— $1,085,981 
Routing and Switching127,934 — — — 127,934 
Platform Software and Services
— 106,527 — — 106,527 
Blue Planet Automation Software and Services
— — 40,892 — 40,892 
Maintenance Support and Training
— — — 138,049 138,049 
Installation and Deployment
— — — 77,610 77,610 
Consulting and Network Design
— — — 14,064 14,064 
Total revenue by product line
$1,213,915 $106,527 $40,892 $229,723 $1,591,057 
Timing of revenue recognition:
Products and services at a point in time
$1,213,915 $36,828 $15,939 $3,268 $1,269,950 
Services transferred over time
— 69,699 24,953 226,455 321,107 
Total revenue by timing of revenue recognition
$1,213,915 $106,527 $40,892 $229,723 $1,591,057 

Six Months Ended May 2, 2020
Networking PlatformsPlatform Software and ServicesBlue Planet Automation Software and ServicesGlobal ServicesTotal
Product lines:
Converged Packet Optical
$1,245,844 $— $— $— $1,245,844 
Routing Switching131,675 — — — 131,675 
Platform Software and Services
— 96,873 — — 96,873 
Blue Planet Automation Software and Services
— — 30,482 — 30,482 
Maintenance Support and Training
— — — 133,271 133,271 
Installation and Deployment
— — — 69,196 69,196 
Consulting and Network Design
— — — 19,624 19,624 
Total revenue by product line
$1,377,519 $96,873 $30,482 $222,091 $1,726,965 
Timing of revenue recognition:
Products and services at a point in time
$1,377,519 $30,092 $8,481 $8,874 $1,424,966 
Services transferred over time
— 66,781 22,001 213,217 301,999 
Total revenue by timing of revenue recognition
$1,377,519 $96,873 $30,482 $222,091 $1,726,965 
For the periods below, Ciena’s geographic distribution of revenue was as follows (in thousands):
Quarter EndedSix Months Ended
May 1,May 2,May 1,May 2,
2021202020212020
Geographic distribution:
Americas
$587,475 $650,381 $1,084,086 $1,224,385 
EMEA
155,054 141,431 310,472 271,396 
APAC
91,398 102,241 196,499 231,184 
Total revenue by geographic distribution
$833,927 $894,053 $1,591,057 $1,726,965 
For the periods below, the only customers that accounted for at least 10% of Ciena’s revenue were as follows (in thousands):
Quarter EndedSix Months Ended
 May 1,May 2,May 1,May 2,
 2021202020212020
AT&T$125,138 $105,630 $193,941 $189,640 
Verizonn/an/an/a203,630 
Total$125,138 $105,630 $193,941 $393,270 
n/aDenotes revenue representing less than 10% of total revenue for the period
Contract Balances
The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers (in thousands):
Balance at May 1, 2021Balance at October 31, 2020
Accounts receivable, net$716,779 $719,405 
Contract assets for unbilled accounts receivable, net$81,437 $85,843 
Deferred revenue$204,299 $158,363 
As of the dates indicated, deferred revenue is comprised of the following (in thousands):
May 1,
2021		October 31,
2020
Products$13,257 $17,534 
Services191,042 140,829 
 204,299 158,363 
Less current portion(147,075)(108,700)
Long-term deferred revenue$57,224 $49,663