Can I use my laptop to distribute my broadband to a voip router through the ethernet port?

I have recently added a voip connection to my broadband connection. Here’s the deal. I have a wireless router (neighbors) that i have access to but cant change settings. I can connect my laptop to it using the wireless option. I have a router that connects to the phone. Can I connect the router to the laptop and use the internet connection I am currently using and use same ip? Do I have to create a vpn? Its a motorola vt2142 (vonage router). Is there any way to do this? I require the phone for my work and would appreciate if someone could help me out with this!

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