Could we use our DSL Router for Fixed Wireless Internet?

[Tenslaster2980]

Switching to a fixed wireless provider (we've been using CenturyLink and it's been almost unusable recently). And I found an old router at my Grandparent's, but someone spilt soda on it (probably 7-Up). Haven't tried plugging it in since it needs to dry, but now we need to figure out what to do if it fails. Could we continue to use the DSL router from CenturyLink, or should we start looking at a new one if the Cisco one doesn't work?
If it helps the router is a Cisco Linksys EA4500.

 

[Rogue Leader]

MERGED QUESTION
Question from Tenslaster2980 : "Could a DSL Router be used for Fixed Wireless?"

Switching to a fixed wireless provider (we've been using CenturyLink and it's been almost unusable recently). And I found an old router at my Grandparent's, but someone spilt soda on it (probably 7-Up). Haven't tried plugging it in since it needs to dry, but now we need to figure out what to do if it fails. Could we continue to use the DSL router from CenturyLink, or should we start looking at a new one if the Cisco one doesn't work?
If it helps the router is a Cisco Linksys EA4500.