The E-30 handsfree phone is designed to provide quick and reliable handsfree communication and can be connected directly to a C.O. line or analog PABX/KSU station.The E-30 features non-volatile memory, a built in dialer, and intelligent call progress detection for automatic hang-up when the call is completed.The E-30 can be programmed to dial up to 5 different numbers on ring no answer or busy and can be configured to dial these numbers until answered.The E-30-EWP shares all of the features of the E-30 in addition to Enhanced Weather Protection (EWP) for outdoor installations where the unit is exposed to precipitation or condensation. EWP products feature foam rubber gaskets and boots, sealed connections, gel-filled butt connectors, as well as urethane or thermal plastic potted circuit boards with internally sealed, field-adjustable trim pots and DIP switches for easy on-site programming. For more information, see DOD# 859. Also known as -VIKING E-30-EWP EWP Stainless Steel Hansdsfree-Viking Electronics EWP Stainless Steel Hansdsfree-Viking Intercoms Hands-Free Phone with Stainless Steel and Enhanced Weather Prot-Viking Electronics E-30-EWP Handsfree Speaker Phone with Enhanced Weather Protec