Cisco voice / fax module for 500 series

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Product Description Cisco - voice / fax module
Device Type Voice / fax module
Form Factor Internal
Analog Ports Qty 4
System Requirements Cisco IOS 12.4(15)XZ
Designed For Cisco 2801, 2801 2-pair, 2801 4-pair, 2801 V3PN, 2811, 2811 2-pair, 2811 4-pair, 2811 V3PN, 2821, 2821 4-pair, 2821 V3PN, 2851, 2851 V3PN, 2901, 2911, 2921, 2951, 3825, 3825 V3PN, 3845, 3845 V3PN, 3925, 3925E, 3945; IAD 2430