One software license is required per device/machine.
The license is perpetual however without a valid Maintenance you will not be entitled to the maintenance benefits.

Silver Maintenance Includes:

• Unlimited number of support requests by support panel.
• Automatic notification of and access to all product updates for 12 months.
• 24x7 access to knowledge base
• 24x7 access to product web communities.
• Sample code, sample projects and white papers.
• Technical webinars/online product demonstrations.
• Unlimited web-based requests using eService.
• Critical security updates
• Access to hotfixes.

Note: A unique license needs to be generated for you based on your order details. This will be sent to you by email as soon as possible once your order has been processed.