will this modem work with Cablevision ( Optimum ) ?

No, this modem is not certified for use with other cable internet service providers. It is only certified to work with Xfinity internet & voice service.

Questions & Answers: ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Certified for Xfinity Internet & Voice (black)

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ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Certified for Xfinity Internet & Voice (black)

Certified to work with Xfinity internet & voice service Not certified for use with other cable internet service providers
DOCSIS 3 1 Cable Modem with 32 downstream x 8 upstream DOCSIS 3 0 channels, 2 downstream x 2 upstream OFDM DOCSIS 3 1 channels
Two 1-Gigabit Ethernet ports and 2 Telephony ports for Xfinity digital voice service
Best for Xfinity internet speed plans up to 2 Gbps
finity internet service required Does not include Wi-Fi

$188^.00 –