How should I properly setup my digital phone line with og devices?

We got digital phone service through Cox and our phone line has unlimited problems ranging from static, Spanish music playing during conversations, to long bouts of no dial tone (aka no phone access). I recently read: "When you connect your home og phone to your office's digital line, when you lift the receiver, the phone tries to draw an electrical current to operate. Typically this is regulated by the phone company's central office. Since the typical proprietary digital phone system has no facilities to regulate the current being drawn through it, your og phone can draw too much current—so much that it either fries itself or in rare cases, damages the phone system's line card." Im wondering if this is causing our problems. Our current setup: Cox digital modem < 2-jack adapter < wall jack < 2-jack adapter < surge protector power strip < computer < old-school digital answering machine < phone. Before I dive into the tangles of wires, can anyone advise me on a new connection setup? Or if its even needed? It could just be our old house for all I know... Thanks!