Optimum Online Boost available only with a subscription to Optimum Online service. Optimum Online Boost is an additional $9.95/month for residential customers with Optimum Online and Optimum Voice, and an additional $14.95/month with Optimum Online only. Service on additional modems is billed separately. Subscription to Optimum Online Boost may require self-installation of a new modem. Cable hook-up, minimum system and modem requirements apply. Other restrictions apply. Where available. First month free offer available to new Optimum Online Boost subscribers who order on the web at Optimum.com. Offer available through 11/30/09 . As of the second month, customers will be billed at the regular rates. Prices and terms subject to change without notice.