Shop From A Grand Variety Of ESI KSUs, Modules & Cards In Our Stock

ESI delivers high performance equipment of telecommunication systems. We provide you with ESI equipment to help improve performance. With our large selection ESI KSUs, modules, and phone cards you are sure to find equipment to fit your business systems needs.

Choose the features you need at completive prices. Let us deliver our high quality ESI equipment to you, by shopping with us. Use our drop down menu to sort through our products easily and seamlessly. If you have any questions regarding these products please request a live chat to chat with a representative or give us a call.

ESI ESI RFID Reader 5000-0545 IP Based EPM Presence Management Control (Refurbished) $ 375.00 375.0 USD Discover more	ESI ESI IVX C-Plus Digital Phone System Cabinet (Refurbished) $ 499.00 499.0 USD Discover more	ESI ESI 4020-1227 IVX E-Class 2 MB Phone System E2-LNC Port Card (Refurbished) 0.0 USD Discover more
ESI ESI 50L Communications Server Phone System (Refurbished) $ 899.00 899.0 USD Discover more	ESI ESI 5000-0135 GEN 1 D12 12-Port Station Card (Refurbished) $ 445.00 445.0 USD Discover more	ESI ESI 500-0160 Gen 1 A12 12-Port Analog Station Card (Refurbished) $ 299.00 299.0 USD Discover more
ESI ESI 5000-0321 IVC Card (Refurbished) $ 499.00 499.0 USD Discover more	ESI ESI 5000-0257 IVX 482 1st Gen Port Expansion Card (Refurbished) $ 395.00 395.0 USD Discover more	ESI ESI 5269-0254 42S Basic KSU Cabinet with Power Supply (Refurbished) $ 475.00 475.0 USD Discover more
ESI ESI IVX S-Class 5000-0269 Gen 1 KSU (Refurbished) $ 299.00 299.0 USD Discover more	ESI ESI 5000-0374 IVX E2 A12 Analog Station Card (Refurbished) $ 495.00 495.0 USD Discover more	ESI ESI IVX C-Class Gen 2 360 Expansion Port Card 3x6x2 (Refurbished) $ 249.00 249.0 USD Discover more
ESI ESI 5000-0106 684 GEN1 Expansion Card (Refurbished) $ 345.00 345.0 USD Discover more	ESI ESI IVX E2 D12 Digital Extension Port Card (Refurbished) $ 445.00 445.0 USD Discover more	ESI ESI PC 5000-0418 Communications Server 612 PC Card (Refurbished) $ 199.00 199.0 USD Discover more
ESI ESI 5000-0419 Communications Server 684 PC Card (Refurbished) $ 245.00 245.0 USD Discover more	ESI ESI 5000-0423 Communications Server 6ALC PC Analog Port Card (Refurbished) $ 269.00 269.0 USD Discover more	ESI ESI Communications Server DLC 82 PRI 23 Channel x 8 Digital x 2 Analog Card (5000-0498) $ 499.00 499.0 USD Discover more
ESI ESI 5000-0424 Communications Server DLC PC T1/PRI Card (Refurbished) $ 189.00 189.0 USD Discover more	ESI ESI 5000-0422 Communications Server DLC12 PC T1/PRI + 12 Station Card (Refurbished) $ 349.00 349.0 USD Discover more	ESI ESI 5000-0461 Communications Server CS IVC 12R12EL (Refurbished) $ 300.00 300.0 USD Discover more