[HamWAN PSDR] Questions from poking around Cacti view of network?

I was going through the graphs/data available via Cacti server and had few questions. 1) What are the Rainier and Tacoma PTP links for on Baldi? Both are showing no traffic recently, are they for future growth? 2) There are three PTP links at Paine I was curious about. I'm guessing the 'Monroe' link is really Bart's client node. But is the Shoreline and 'Bruce' PTP links purpose? The Shoreline link is showing lots of traffic, is that the uplink from the Westin? 3) There seems to be a big hole in the data in the last 24 hours, any idea what happen? Seems to impact all the data sources, so probably something on the server side? Thanks Kenny