Home phone on fibre during power outage

[wireless]

Telus recently 'upgraded' my home phone from copper to fibre using the Alcatel-Lucent ONT. All was well until a power outage occurred in my neighbourhood, and the home phone died (internet too, with no ONT power). The sales person said there would be battery backup to handle this situation, but the 'btry' light on the ONT is not even lit. Is there supposed to be a battery in these things?



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