Incidentally I was using a spare Dynalink 1320 to half bridge a second connection into another unit. Of course it burns out after less than a year of use. I'd even modd'd this one with a cheap heatsink from Jaycar before using it based on it's well known overheating reputation.
So imo the top 3 worse ISP provided modem in NZ DSL history...
1: Dlink 302
2: Dlink 502
3: Dynalink 1320
Thankfully the modern replacements for a basic modem that can bridge pppoa adsl eg: TP Link TD-8840 or Drayek Vigor 120 are much much better!
Also in before someone says Genius