Apologies for being off topic : I strongly recommend our own kitizen Johnson’s firmware for ZyXEL modems this VMG 1312 B10A included. It provides stats graphs of SNRM vs time as web pages supplied over http, and also an http-based service that delivers raw Broadcom stats delivery service over http, so no apologies required but dsl stats would still be usable just the same. The firmware was originally built to enable the use of IP MTU 1500 ( PPP MTU 1508=1500+8 ). The firmware might be of interest to you.