The following battery is compatible with the Arris TM502G modem:
The following battery is compatible with the Arris TM802 modem:
We're happy to recommend these accessories for Optimum Voice
This valuable accessory provides uninterrupted voice service including emergency 911 services during a power failure. When electrical power is not available, the modem will automatically switch to the battery back-up for power. When electrical power is restored, the modem will switch back to electrical power and the battery back-up will recharge right in the modem. No intervention is required.
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