I don't have trouble talking on the phone but I HATE answering machines. I'm not too fond of paging, either. That's because I used to work with a bunch of people who would sit and make fun of the way people talked when they paged. Like if someone's voice was "too nasal". Or they messed up on a name, which is easy to do because there are people from all over the world at my workplace.
I don't like being interrupted by the phone when I am working, unless it is an urgent situation. I have one co-worker who will send me an e-mail and if I don't answer right away, she calls me. Nine times out of ten it is not urgent. I dislike it because it breaks my concentration. I have tried to tell her not to interrupt me so often but it doesn't seem to sink in (no, she is not Aspy). There are at least 50 different people that I am "on call' for, and even if I was NT I couldn't possibly deal with all their requests at once. When the phone rings or some one e-mails me, I am not allowed to ignore it. Before I realized I had AS I wondered why I would go home stressed to the limit; it is because I am doing something my neurological system is not designed to handle. I only wish there was some way I could tell my boss that, that instead of criticizing me when I occasionally lose my cool, he should be amazed that I can even function as well as I can.
Also, one of my pet peeves is when people call me at home (usually telemarketers) and ask for me without saying who they are first, so that you have to repeatedly ask who is calling. I was always taught that business phone etiquette dictated that you say who you are and then ask for the person. But apparently not these days. And it is not always telemarketers who do this. Because I am active in a couple of organizations it is not uncommon for me to receive calls from people I don't know relating to organizational business. I have started to tell those callers that if they do not want me to hang up on them in the future then they need to identify themselves right at the start, because if I have to ask who they are, I am going to hang up. I think the problem is people have come to rely on Caller ID so much they don't realize it does not always work or that people don't always have it.