Your search for "881-775-50" revealed the following:
Dialogic D4PCIUF 881-775-50 D4PCIUF Media Voice Fax Board Module
SKU: NSH-5027
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 214.99
• Only 2 remaining
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New Dialogic D4PCIUF 881-775-50 D4PCIUF Media Voice Fax Board Module
SKU: NSN-8159
Condition: New
Shipping: Overnight Options
Warranty: 365 days