Here's a few examples to help you on your way:
American-style ring
This is the standard ring type used in the US and Canada. This is formed of a 2 second ring followed by 4 seconds of silence before repeating itself.
60;(2+4)
It sounds like: riiiiiiinnnnnnggg ................... riiiiiiinnnnnnggg ...................
(note ......... represents the long silence)
British-style ring
This is the standard ring type used in the UK, Ireland, Australia and New Zealand. This is formed of a 0.4 second ring, followed by 0.2 seconds of silence, another 0.4 second ring then 2 seconds of silence before repeating itself.
60;(.4+.2,.4+2)
It sounds like: ring ring ......... ring ring .........
Party-line-style ring
This is an alternate ring style that was included on many legacy analog "party-line" circuits. This is formed of a 0.3 second ring, followed by 0.2 seconds of silence then a 1 second ring, followed by 0.2 seconds of silence, another 0.3 second ring then 4 seconds of silence before repeating itself.
60;(.3+.2,1+.2,.3+4)
It sounds like: ring riiinngg ring ................... ring riiinngg ring ...................
(It's quite hard to describe the different ring sounds in words!)
