Nortel Networks Inc. is no longer around but their equipment certainly is, and still makes up the better part of our Public Switched Telephone Network or PSTN on the land line side of the American network. The following is the bulk list of PDF documents used to keep up equipment used in our telecommunication network called ‘NTP’s’ or Nortel Technical Practices. I worked for several years at Nortel, and often get requests for this information. I will post more as time allows, but this may have to do for 2013 unless there is another business critical issue. I am happy to help but sometimes it’s easier just post instead of sending documents as needed. I hope this will help fellow engineers and possibly even save us a few calls.