Feature LicensesLicensesGCC One-time upgrade additional 50 Users/Extensions Grandstream GCC-UC-EXTRA-50-EXT GCC One-time upgrade additional 50 Users/Extensions Please feel free to contact us about this item, and we will recommend an IT Sales and Service Provider in your area. Resellers: Log in for pricing and to place orders. Licensed item. Delivered via email. In stock email will be sent. Instock notification already exists. Please sign in first. Enquire Order SKU: Supplier Code: Summary GCC One-time upgrade additional 50 Users/Extensions You Recently Viewed GCC 1 Year Firewall Security Update Package ACM5000/ACM5500 power supply with IEC input Extra 16 Users/Extensions, 4 Concurrent Calls, Custom Logo/Top-Domain name Subscription Plan 1 Year Send us an email for this product Message sent Failed to send message, please try again Name Email Message Website URL Close Send