What do these mean ?

[old Bill]

Found this section hidden away on the 2700.
– Resets
  Local Network  Clears all devices from your Local Network list. Network devices will appear in the list as they are re-discovered.
  DSL Connection  Retrains your DSL connection on the same line.
  ISP Connection  Resets your PPP connections and/or releases and renews your broadband IP address.
  Broadband Link  Reestablishes your broadband link.
  BT2700HGV  Reboots your BT2700HGV.
  to Factory State  Warning! Resets configuration parameters.

Note: These actions are for diagnostic and troubleshooting purposes only. Some actions will change configuration settings and will affect the operation of your gateway.

If I want to change the pipe I am on from Enta but not reboot the system which one do I choose as they all seem to do the same ?

[Lance]

ISP connection for that, Bill

Broadbank link is a combination of the two above it. DSL connection is the sync with the exchange.

[old Bill]

Thanks Lance for that.