I currently have a Arris Gateway, and 1 Portal, was thinking of buying another Portal box if I can get to the bedroom with wireless.
There is a way, but it isn't exactly pretty, actually there are a couple ways, but you will be better off (unless you really like to tinker with stuff), and cheaper, to pay for an outlet installation
Simply I would say no. The portal has to be configured to your main gateway and ideally requires an installer to configure it properly. There is usually a charge for placement of a new cable. I would mention that an outlet is required when you talk to a representative to setup a convenient time to bring and install new portal. Having more than 1 portal greatly increases your enjoyment of the gateway as you have complete access to the same package in multiple rooms. If you live in the Chilliwack area I can help more (that's where I work/install)
Hope this helps a little and have a great day
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