when entering certain Numbers into our call campaign database, we receive a "broken pipe" error
ERROR[2960]: utils.c:1173 ast_careful_fwrite: fwrite() returned error: Broken pipe
This is very old problem in Asterisk. Typically you shouldn't notice on that, it doesn;t cause any problems with stability. We can check it for you and patch your Asterisk to prevent of displaying this message in console and logs.
You haven't given much info but I am available now to have a look at this for you. What version of Asterisk are you using? Are you using Vicidial? I'll need you ssh details to get started.