Cisco NM-HDA+ EM-HDA-4FXC FXS 4 Ports Analog Voice/Fax Expansion Base Module

Specifications:
• Manufacturer: Cisco
• Product ID: EM-HDA-4FXO
• Product Description: 4-port voice/fax expansion module – FXS
• Product Type: Expansion Module
• Application/Usage: Data Networking