I`m experienced in this domain. I can write at this price, more than 50 articles, unique content for each 100 words -1 $ 1 article with 500 words - 5 $ 1 article with 500 words + 1 quality chart -7 $ I can provide you all kinds of article about telephony, networking, PTSN and related. Please post here how many articles you need or via PM. Payment will be made after each article for users without ratings. For the ones with more than 10 ratings, after 5 articles. Thank you! Daniel