Polycom Vortex EF2201 (Digital Hybrid) Telephone Interface

Polycom Vortex EF2280 8-Channel Mixer and Noise Cancellation with Power Supply

Vortex EF2241 Polycom 2201-12241-601

EF2280 Polycom Vortex Multi-Channel Echo Noise Cancellation Processor

Polycom Vortex EF2280 Multi-Channel Echo Noise Cancellation

Polycom Vortex EF2201 Hybrid Mixer, 2201-82201-001 NO POWER ADAPTER

Polycom ASPI VORTEX EF2201 Telephone Interface

Polycom Vortex EF2280 NA Telecom Coference System p/n 2201-12280-001