http://z5lcip4dafatwwa6hvyibizpzwycvwp67cjga3hzjhxhwvuyaqavxnid.onion/tech/941
Item types 8 and T are in effect- the item specifier is asking "give me a telnet session" or "give me a tn3270 session" [for interactibility]. I don't know what those are like. I'm vaguely aware nc(1) says it's like telnet(1) but scripts nicely and reports errors better. tn3270 is an attempt to provide a more sophisticated shell in the spirit of telnet, that is not like telnet(1) I think.