Mike:
I wouldn't say that there are a lot of them out there, but there are plenty of bits and pieces. I know that there are some in former GTE properties that are now Verizon. Many former GTE territories are still using the 3072 line ESU made by GTE/Automatic Electric. Here are a few remaining GTD5 remotes but I have absolutely no clue what's hosting them:
SARKFLXARSA (St. Armonds Key, FL)
SARKFLXARSA (Parrish, FL)
LAIEHICORS0 (Laie, HI)
MKPUHICORS1 (Makapu, HI)
KLKKHICORS0 (Kealakekua, HI)
KLAOHICORS0 (Kalaoa, HI)
VRNNORXXRS0 (Veronia, OR)
SCHLORXXRS1 (Scholls, OR)
STFRORXXRS1 (Stafford, OR)
TRRHINXDRS0 (Terre Haute, IN)
HRSNIDXARS1 (Harrison, ID)
In the Verizon areas where I know that GTD5's existed, they all appear to have been replaced with the 5ESS. I wonder if there is a way that the many AE ESU's are working behind them somehow.
This is a good question for one of the former GTE telco guys for sure.
