OK - See attached. I have found this info on DIP switch settings for option 467 in 455M (for the buffered M42). This is exactly what I need except ----My M42 is a "Basic" Telex unit (no buffer memory) and I can't find a similar set of DIP switches. Dang! There must be some way to enable an installer to set options beyond DbLF (Double Line Feed) which is where my M42 stops. Otherwise I can't set the Baud Rate or Answer-Back, etc.!Does anyone have 518M which is installation info for the Basic M42? That might give me a clue. Did any of you guys ever install a Telex M42 and have dim memories of how to set the Answer-back?Thanks,On Thu, Sep 30, 2021 at 11:43 AM Nick England <navy.radio@gmail.com> wrote:FWIW, here is a list of the M42 options (thanks to Leanne W1WXS)The leftmost column options are listed in the 516M manual as "User Programmable" while the rest are the "Installer Programmable" ones which I can't figure out how to change,,,,On Wed, Sep 29, 2021 at 2:18 PM Nick England <navy.radio@gmail.com> wrote:I have finally figured out some options on my Telex Basic M42 ASR (thanks to greenkeyer Leanne for a copy of 516M).But when I get to the end of the User Programmable Options list, I am stuck.How do I access the Installer Programmable Options like baud rate, answer-back, etc.Probably the magic switch is staring me in the face, but I can’t figure it out. I am fully prepared to slap my forehead and say Doh! if someone can please enlighten me.CheersNick--