Your search for "N1148T-ON" revealed the following:
Dell N1148T-ON N1100 Series 48x 1GB RJ45 4x 10GB SFP+ EMC Switch
SKU: NSB-5330
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 1,052.99
• Only 2 remaining
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NEW For Dell N1100 Series HCDHT 575-BBJS-N1100 Rack Mount Bracket Kit
SKU: NSB-3887
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 18.99
• 150 in stock
Call if you need more
NEW Dell N1148T-ON N1100 Series 48x 1GB RJ45 4x 10GB SFP+ EMC Switch
SKU: NSN-5548
Condition: New
Shipping: Overnight Options
Warranty: 365 days