My advice as a past unlucky telemarketing employee:
RUN!! !!
Telemarketing requires social skills that can sometimes put great anxiety on an Aspie. I fuddled my way through the gig for a year (didn't have much of a choice back then), but I dreaded waking up in the morning. I wasn't even really selling anything all that bad. I was upselling like items to customers who were one-time buyers of Lenox. Still, I had a problem with invading people's privacy like that.
I took a defensive sales approach: Being overly apologetic, understanding, and roping in those who would otherwise be pushed away by aggressive salespeople. It worked for me, and I was never criticized for it, but there are some telemarketing firms that will yell at you if you aren't a complete pushy douchebag to each and every customer. I don't know what company you're looking at, but be aware of this type of environment. They yell and scream in your ears as they walk up your cube aisles, making it impossible for you to do an already difficult job, let alone take your AS into account.
Good luck with whatever you do, and I hope for your sake that you find a niche elsewhere. Unfortunately, this economy has brought people to taking jobs like this because it's the only thing available.
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"If there's one thing in my life that these years have taught it's that you can always see it coming, but you can never stop it." ~Cowboy Junkies