Optimum Voice is a cable-modem service. A 55 charge per line covers certain NY excise taxes. In CT and NJ sales tax, an E-911 fee and the Federal Universal Service Fund fee (USF) may apply and in NY, an E-911 fee and the Federal Universal Service Fund fee (USF) may apply. All fees and taxes will be added to bill. If keeping phone #, transfer charge applies. W/o battery backup, if you lose power, if service is disconnected or if broadband services are disrupted or disconnected, E-911 service will disconnect and not function or operate. If moving, new address must be provided before E-911 can function properly. Enhanced Voicemail not avail outside continental U.S.Optimum Voice International Calling available to all Optimum Voice residential customers. Remote dialing from mobile phone requires one-time setup. International calls are billed to your Optimum account. Calling rates & terms subject to change and discontinuance w/o notice. Where available. Visit optimum.net for full details.