Can I use another port other than 443 for SSL communication?

SSL is in no way tied to a single port value; in fact, as a protocol, it can be used over any transport medium, as long as that medium provides a bidirectional stream for arbitrary bytes.

In a Web context, you can use any port other than 443, provided that you specify it in the URL: https://www.example.com:7342/foobar.html

Note that there are some networks (especially some free WiFi access points) that don't allow traffic over other ports than 443 or 80; which means that using a port other than 443, though perfectly standard and supported, may imply some practical usage restrictions.