In the example I use the number to the Liverpol Mailbox BBS which has a Special interest Z88 section. Paranthesis, hyphens and spaces are ignored. If the call is unsuccessful your telephone switchboard might only handle pulse dialing. P0 pulse dials a zero to get through the company switchboard to the line. W makes the modem wait for a second dialtone.
T switches to touch-tone dialing.
009 is the Swedish number for telephone calls to other countries. 44 is the UK country number. If you call another modem you will hear some strange sounds while the modems negotiates which protocol and speed to use. Touching a key while modem negotiation will cancel the connection. Now it is time to start communicating with the remote system.