call on (phrasal verb):
- officially ask someone to do something
- ask a student a question
- decide to use something
- produce a quality
- ask someone to prove statement
- visit someone for short time
Clearly this is a multi-purpose expression, as each of your examples has a slightly different meaning:
Probably "visit someone for a short time", or possibly "ask someone to do something". Note it should be either "call up" or "call on", but not "call up on". That's unnecessarily mixing the expressions.
A variation on "ask someone to prove statement", meaning "ask someone to take a certain action"
"Officially ask someone to do something", in this case, "to give a speech"
This one is difficult to understand without more context, but my best guess is that it's a finance term used in the stock market:
Call options are an agreement that give the option buyer the right, but not the obligation, to buy a stock, bond, commodity or other instrument at a specified price within a specific time period.
This example is not actually the phrasal verb, but rather simply "call" as a noun, followed by the adverb phrase "on this occasion". The company has decided to "renew" the "call" meaning that they are extending the specified time period.